Merge

40 files changed, 798 insertions, 340 deletions

diff --git a/indra/llappearance/llavatarappearance.cpp b/indra/llappearance/llavatarappearance.cpp
index 38cda2e2f1..0c0ad0d265 100644
--- a/indra/llappearance/llavatarappearance.cpp
+++ b/indra/llappearance/llavatarappearance.cpp
@@ -81,8 +81,8 @@ public:
 	LLAvatarBoneInfo() : mIsJoint(FALSE) {}
 	~LLAvatarBoneInfo()
 	{
-		std::for_each(mChildList.begin(), mChildList.end(), DeletePointer());
-		mChildList.clear();
+		std::for_each(mChildren.begin(), mChildren.end(), DeletePointer());
+		mChildren.clear();
 	}
 	BOOL parseXml(LLXmlTreeNode* node);
 	
@@ -96,8 +96,8 @@ private:
 	LLVector3 mRot;
 	LLVector3 mScale;
 	LLVector3 mPivot;
-	typedef std::vector<LLAvatarBoneInfo*> child_list_t;
-	child_list_t mChildList;
+	typedef std::vector<LLAvatarBoneInfo*> bones_t;
+	bones_t mChildren;
 };
 
 //------------------------------------------------------------------------
@@ -679,8 +679,8 @@ BOOL LLAvatarAppearance::setupBone(const LLAvatarBoneInfo* info, LLJoint* parent
 
 
 	// setup children
-	LLAvatarBoneInfo::child_list_t::const_iterator iter;
-	for (iter = info->mChildList.begin(); iter != info->mChildList.end(); ++iter)
+	LLAvatarBoneInfo::bones_t::const_iterator iter;
+	for (iter = info->mChildren.begin(); iter != info->mChildren.end(); ++iter)
 	{
 		LLAvatarBoneInfo *child_info = *iter;
 		if (!setupBone(child_info, joint, volume_num, joint_num))
@@ -1669,7 +1669,7 @@ BOOL LLAvatarBoneInfo::parseXml(LLXmlTreeNode* node)
 			delete child_info;
 			return FALSE;
 		}
-		mChildList.push_back(child_info);
+		mChildren.push_back(child_info);
 	}
 	return TRUE;
 }
@@ -1728,8 +1728,8 @@ void LLAvatarAppearance::makeJointAliases(LLAvatarBoneInfo *bone_info)
         mJointAliasMap[*i] = bone_name;
     }
 
-    LLAvatarBoneInfo::child_list_t::const_iterator iter;
-    for (iter = bone_info->mChildList.begin(); iter != bone_info->mChildList.end(); ++iter)
+    LLAvatarBoneInfo::bones_t::const_iterator iter;
+    for (iter = bone_info->mChildren.begin(); iter != bone_info->mChildren.end(); ++iter)
     {
         makeJointAliases( *iter );
     }
diff --git a/indra/llappearance/llavatarjoint.cpp b/indra/llappearance/llavatarjoint.cpp
index 29642be099..80b3e42b52 100644
--- a/indra/llappearance/llavatarjoint.cpp
+++ b/indra/llappearance/llavatarjoint.cpp
@@ -100,7 +100,7 @@ void LLAvatarJoint::setValid( BOOL valid, BOOL recursive )
 	//----------------------------------------------------------------
 	if (recursive)
 	{
-		for (child_list_t::iterator iter = mChildren.begin();
+		for (joints_t::iterator iter = mChildren.begin();
 			 iter != mChildren.end(); ++iter)
 		{
 			LLAvatarJoint* joint = (LLAvatarJoint*)(*iter);
@@ -118,10 +118,10 @@ void LLAvatarJoint::setSkeletonComponents( U32 comp, BOOL recursive )
 	mComponents = comp;
 	if (recursive)
 	{
-		for (child_list_t::iterator iter = mChildren.begin();
+		for (joints_t::iterator iter = mChildren.begin();
 			 iter != mChildren.end(); ++iter)
 		{
-			LLAvatarJoint* joint = dynamic_cast<LLAvatarJoint*>(*iter);
+			LLAvatarJoint* joint = static_cast<LLAvatarJoint*>(*iter);
 			joint->setSkeletonComponents(comp, recursive);
 		}
 	}
@@ -133,7 +133,7 @@ void LLAvatarJoint::setVisible(BOOL visible, BOOL recursive)
 
 	if (recursive)
 	{
-		for (child_list_t::iterator iter = mChildren.begin();
+		for (joints_t::iterator iter = mChildren.begin();
 			 iter != mChildren.end(); ++iter)
 		{
 			LLAvatarJoint* joint = (LLAvatarJoint*)(*iter);
@@ -144,27 +144,27 @@ void LLAvatarJoint::setVisible(BOOL visible, BOOL recursive)
 
 void LLAvatarJoint::updateFaceSizes(U32 &num_vertices, U32& num_indices, F32 pixel_area)
 {
-	for (child_list_t::iterator iter = mChildren.begin();
+	for (joints_t::iterator iter = mChildren.begin();
 		 iter != mChildren.end(); ++iter)
 	{
-		LLAvatarJoint* joint = dynamic_cast<LLAvatarJoint*>(*iter);
+		LLAvatarJoint* joint = static_cast<LLAvatarJoint*>(*iter);
 		joint->updateFaceSizes(num_vertices, num_indices, pixel_area);
 	}
 }
 
 void LLAvatarJoint::updateFaceData(LLFace *face, F32 pixel_area, BOOL damp_wind, bool terse_update)
 {
-	for (child_list_t::iterator iter = mChildren.begin();
+	for (joints_t::iterator iter = mChildren.begin();
 		 iter != mChildren.end(); ++iter)
 	{
-		LLAvatarJoint* joint = dynamic_cast<LLAvatarJoint*>(*iter);
+		LLAvatarJoint* joint = static_cast<LLAvatarJoint*>(*iter);
 		joint->updateFaceData(face, pixel_area, damp_wind, terse_update);
 	}
 }
 
 void LLAvatarJoint::updateJointGeometry()
 {
-	for (child_list_t::iterator iter = mChildren.begin();
+	for (joints_t::iterator iter = mChildren.begin();
 		 iter != mChildren.end(); ++iter)
 	{
 		LLAvatarJoint* joint = dynamic_cast<LLAvatarJoint*>(*iter);
@@ -178,10 +178,10 @@ BOOL LLAvatarJoint::updateLOD(F32 pixel_area, BOOL activate)
 	BOOL lod_changed = FALSE;
 	BOOL found_lod = FALSE;
 
-	for (child_list_t::iterator iter = mChildren.begin();
+	for (joints_t::iterator iter = mChildren.begin();
 		 iter != mChildren.end(); ++iter)
 	{
-		LLAvatarJoint* joint = dynamic_cast<LLAvatarJoint*>(*iter);
+		LLAvatarJoint* joint = static_cast<LLAvatarJoint*>(*iter);
 		F32 jointLOD = joint->getLOD();
 		
 		if (found_lod || jointLOD == DEFAULT_AVATAR_JOINT_LOD)
@@ -207,10 +207,10 @@ BOOL LLAvatarJoint::updateLOD(F32 pixel_area, BOOL activate)
 
 void LLAvatarJoint::dump()
 {
-	for (child_list_t::iterator iter = mChildren.begin();
+	for (joints_t::iterator iter = mChildren.begin();
 		 iter != mChildren.end(); ++iter)
 	{
-		LLAvatarJoint* joint = dynamic_cast<LLAvatarJoint*>(*iter);
+		LLAvatarJoint* joint = static_cast<LLAvatarJoint*>(*iter);
 		joint->dump();
 	}
 }
diff --git a/indra/llappearance/llavatarjointmesh.cpp b/indra/llappearance/llavatarjointmesh.cpp
index 7ca0928171..0a23b1fda3 100644
--- a/indra/llappearance/llavatarjointmesh.cpp
+++ b/indra/llappearance/llavatarjointmesh.cpp
@@ -379,7 +379,7 @@ void LLAvatarJointMesh::setupJoint(LLAvatarJoint* current_joint)
 	}
 
 	// depth-first traversal
-	for (LLJoint::child_list_t::iterator iter = current_joint->mChildren.begin();
+	for (LLJoint::joints_t::iterator iter = current_joint->mChildren.begin();
 		 iter != current_joint->mChildren.end(); ++iter)
 	{
 		LLAvatarJoint* child_joint = (LLAvatarJoint*)(*iter);
diff --git a/indra/llappearance/lldriverparam.cpp b/indra/llappearance/lldriverparam.cpp
index e5e502b158..05d26fbe7a 100644
--- a/indra/llappearance/lldriverparam.cpp
+++ b/indra/llappearance/lldriverparam.cpp
@@ -614,7 +614,7 @@ void LLDriverParam::setDrivenWeight(LLDrivenEntry *driven, F32 driven_weight)
 		mAvatarAppearance->isValid() &&
 		driven->mParam->getCrossWearable())
 	{
-		LLWearable* wearable = dynamic_cast<LLWearable*> (mWearablep);
+		LLWearable* wearable = mWearablep;
 		if (mAvatarAppearance->getWearableData()->isOnTop(wearable))
 		{
 			use_self = true;
diff --git a/indra/llappearance/llpolyskeletaldistortion.cpp b/indra/llappearance/llpolyskeletaldistortion.cpp
index 5b77a7433a..ae38c25dbf 100644
--- a/indra/llappearance/llpolyskeletaldistortion.cpp
+++ b/indra/llappearance/llpolyskeletaldistortion.cpp
@@ -160,7 +160,7 @@ BOOL LLPolySkeletalDistortion::setInfo(LLPolySkeletalDistortionInfo *info)
         mJointScales[joint] = bone_info->mScaleDeformation;
 
         // apply to children that need to inherit it
-        for (LLJoint::child_list_t::iterator iter = joint->mChildren.begin();
+        for (LLJoint::joints_t::iterator iter = joint->mChildren.begin();
              iter != joint->mChildren.end(); ++iter)
         {
             LLAvatarJoint* child_joint = (LLAvatarJoint*)(*iter);
diff --git a/indra/llcharacter/llcharacter.cpp b/indra/llcharacter/llcharacter.cpp
index 4df975ecc5..b764ef0c7e 100644
--- a/indra/llcharacter/llcharacter.cpp
+++ b/indra/llcharacter/llcharacter.cpp
@@ -252,7 +252,7 @@ void LLCharacter::dumpCharacter( LLJoint* joint )
 	LL_INFOS() << "DEBUG: " << joint->getName() << " (" << (joint->getParent()?joint->getParent()->getName():std::string("ROOT")) << ")" << LL_ENDL;
 
 	// recurse
-	for (LLJoint::child_list_t::iterator iter = joint->mChildren.begin();
+	for (LLJoint::joints_t::iterator iter = joint->mChildren.begin();
 		 iter != joint->mChildren.end(); ++iter)
 	{
 		LLJoint* child_joint = *iter;
diff --git a/indra/llcharacter/lljoint.cpp b/indra/llcharacter/lljoint.cpp
index e2f512f86e..a685df5925 100644
--- a/indra/llcharacter/lljoint.cpp
+++ b/indra/llcharacter/lljoint.cpp
@@ -209,7 +209,7 @@ void LLJoint::touch(U32 flags)
 			child_flags |= POSITION_DIRTY;
 		}
 
-		for (child_list_t::iterator iter = mChildren.begin();
+		for (joints_t::iterator iter = mChildren.begin();
 			 iter != mChildren.end(); ++iter)
 		{
 			LLJoint* joint = *iter;
@@ -251,7 +251,7 @@ LLJoint *LLJoint::findJoint( const std::string &name )
 	if (name == getName())
 		return this;
 
-	for (child_list_t::iterator iter = mChildren.begin();
+	for (joints_t::iterator iter = mChildren.begin();
 		 iter != mChildren.end(); ++iter)
 	{
 		LLJoint* joint = *iter;
@@ -286,7 +286,7 @@ void LLJoint::addChild(LLJoint* joint)
 //--------------------------------------------------------------------
 void LLJoint::removeChild(LLJoint* joint)
 {
-	child_list_t::iterator iter = std::find(mChildren.begin(), mChildren.end(), joint);
+	joints_t::iterator iter = std::find(mChildren.begin(), mChildren.end(), joint);
 	if (iter != mChildren.end())
 	{
 		mChildren.erase(iter);
@@ -303,16 +303,17 @@ void LLJoint::removeChild(LLJoint* joint)
 //--------------------------------------------------------------------
 void LLJoint::removeAllChildren()
 {
-	for (child_list_t::iterator iter = mChildren.begin();
-		 iter != mChildren.end();)
+	for (LLJoint* joint : mChildren)
 	{
-		child_list_t::iterator curiter = iter++;
-		LLJoint* joint = *curiter;
-		mChildren.erase(curiter);
-		joint->mXform.setParent(NULL);
-		joint->mParent = NULL;
-		joint->touch();
+		if (joint)
+        {
+		    joint->mXform.setParent(NULL);
+		    joint->mParent = NULL;
+		    joint->touch();
+            //delete joint;
+        }
 	}
+    mChildren.clear();
 }
 
 
@@ -985,7 +986,7 @@ void LLJoint::updateWorldMatrixChildren()
 	{
 		updateWorldMatrix();
 	}
-	for (child_list_t::iterator iter = mChildren.begin();
+	for (joints_t::iterator iter = mChildren.begin();
 		 iter != mChildren.end(); ++iter)
 	{
 		LLJoint* joint = *iter;
@@ -1031,7 +1032,7 @@ void LLJoint::clampRotation(LLQuaternion old_rot, LLQuaternion new_rot)
 {
 	LLVector3 main_axis(1.f, 0.f, 0.f);
 
-	for (child_list_t::iterator iter = mChildren.begin();
+	for (joints_t::iterator iter = mChildren.begin();
 		 iter != mChildren.end(); ++iter)
 	{
 		LLJoint* joint = *iter;
diff --git a/indra/llcharacter/lljoint.h b/indra/llcharacter/lljoint.h
index 8112d246f2..aa997a4cf7 100644
--- a/indra/llcharacter/lljoint.h
+++ b/indra/llcharacter/lljoint.h
@@ -139,8 +139,8 @@ public:
 	S32				mJointNum;
 
 	// child joints
-	typedef std::list<LLJoint*> child_list_t;
-	child_list_t mChildren;
+	typedef std::vector<LLJoint*> joints_t;
+	joints_t mChildren;
 
 	// debug statics
 	static S32		sNumTouches;
diff --git a/indra/llcharacter/llkeyframemotion.cpp b/indra/llcharacter/llkeyframemotion.cpp
index 5d323ed5d6..cde38c8091 100644
--- a/indra/llcharacter/llkeyframemotion.cpp
+++ b/indra/llcharacter/llkeyframemotion.cpp
@@ -2321,7 +2321,7 @@ void LLKeyframeMotion::onLoadComplete(LLVFS *vfs,
 	LLCharacter* character = *char_iter;
 
 	// look for an existing instance of this motion
-	LLKeyframeMotion* motionp = dynamic_cast<LLKeyframeMotion*> (character->findMotion(asset_uuid));
+	LLKeyframeMotion* motionp = static_cast<LLKeyframeMotion*> (character->findMotion(asset_uuid));
 	if (motionp)
 	{
 		if (0 == status)
diff --git a/indra/llcommon/llerror.cpp b/indra/llcommon/llerror.cpp
index 335a0995fe..b46f49ba34 100644
--- a/indra/llcommon/llerror.cpp
+++ b/indra/llcommon/llerror.cpp
@@ -181,32 +181,35 @@ namespace {
             return LLError::getEnabledLogTypesMask() & 0x04;
         }
         
+        LL_FORCE_INLINE std::string createANSI(const std::string& color)
+        {
+            std::string ansi_code;
+            ansi_code  += '\033';
+            ansi_code  += "[";
+            ansi_code  += color;
+            ansi_code += "m";
+            return ansi_code;
+        }
+
 		virtual void recordMessage(LLError::ELevel level,
 					   const std::string& message) override
-		{
-			if (ANSI_PROBE == mUseANSI)
-				mUseANSI = (checkANSI() ? ANSI_YES : ANSI_NO);
+		{            
+            static std::string s_ansi_error = createANSI("31"); // red
+            static std::string s_ansi_warn  = createANSI("34"); // blue
+            static std::string s_ansi_debug = createANSI("35"); // magenta
+
+            mUseANSI = (ANSI_PROBE == mUseANSI) ? (checkANSI() ? ANSI_YES : ANSI_NO) : mUseANSI;
 
 			if (ANSI_YES == mUseANSI)
 			{
-				// Default all message levels to bold so we can distinguish our own messages from those dumped by subprocesses and libraries.
-				colorANSI("1"); // bold
-				switch (level) {
-				case LLError::LEVEL_ERROR:
-					colorANSI("31"); // red
-					break;
-				case LLError::LEVEL_WARN:
-					colorANSI("34"); // blue
-					break;
-				case LLError::LEVEL_DEBUG:
-					colorANSI("35"); // magenta
-					break;
-				default:
-					break;
-				}
+                writeANSI((level == LLError::LEVEL_ERROR) ? s_ansi_error :
+                          (level == LLError::LEVEL_WARN)  ? s_ansi_warn :
+                                                            s_ansi_debug, message);
 			}
-			fprintf(stderr, "%s\n", message.c_str());
-			if (ANSI_YES == mUseANSI) colorANSI("0"); // reset
+            else
+            {
+                 fprintf(stderr, "%s\n", message.c_str());
+            }
 		}
 	
 	private:
@@ -217,11 +220,14 @@ namespace {
 			ANSI_NO
 		}					mUseANSI;
 
-		void colorANSI(const std::string color)
+        LL_FORCE_INLINE void writeANSI(const std::string& ansi_code, const std::string& message)
 		{
-			// ANSI color code escape sequence
-			fprintf(stderr, "\033[%sm", color.c_str() );
-		};
+            static std::string s_ansi_bold  = createANSI("1");  // bold
+            static std::string s_ansi_reset = createANSI("0");  // reset
+			// ANSI color code escape sequence, message, and reset in one fprintf call
+            // Default all message levels to bold so we can distinguish our own messages from those dumped by subprocesses and libraries.
+			fprintf(stderr, "%s%s%s\n%s", s_ansi_bold.c_str(), ansi_code.c_str(), message.c_str(), s_ansi_reset.c_str() );
+		}
 
 		bool checkANSI(void)
 		{
@@ -232,8 +238,8 @@ namespace {
 			return (0 != isatty(2)) &&
 				(NULL == getenv("LL_NO_ANSI_COLOR"));
 #endif // LL_LINUX
-			return false;
-		};
+            return FALSE; // works in a cygwin shell... ;)
+		}
 	};
 
 	class RecordToFixedBuffer : public LLError::Recorder
diff --git a/indra/llmath/llvolume.cpp b/indra/llmath/llvolume.cpp
index e32625796c..df867b332d 100644
--- a/indra/llmath/llvolume.cpp
+++ b/indra/llmath/llvolume.cpp
@@ -4656,6 +4656,10 @@ LLVolumeFace::LLVolumeFace() :
 	mTexCoords(NULL),
 	mIndices(NULL),
 	mWeights(NULL),
+#if USE_SEPARATE_JOINT_INDICES_AND_WEIGHTS
+    mJustWeights(NULL),
+    mJointIndices(NULL),
+#endif
     mWeightsScrubbed(FALSE),
 	mOctree(NULL),
 	mOptimized(FALSE)
@@ -4682,6 +4686,10 @@ LLVolumeFace::LLVolumeFace(const LLVolumeFace& src)
 	mTexCoords(NULL),
 	mIndices(NULL),
 	mWeights(NULL),
+#if USE_SEPARATE_JOINT_INDICES_AND_WEIGHTS
+    mJustWeights(NULL),
+    mJointIndices(NULL),
+#endif
     mWeightsScrubbed(FALSE),
 	mOctree(NULL)
 { 
@@ -4746,24 +4754,46 @@ LLVolumeFace& LLVolumeFace::operator=(const LLVolumeFace& src)
 
 		if (src.mWeights)
 		{
+            llassert(!mWeights); // don't orphan an old alloc here accidentally
 			allocateWeights(src.mNumVertices);
-			LLVector4a::memcpyNonAliased16((F32*) mWeights, (F32*) src.mWeights, vert_size);
+			LLVector4a::memcpyNonAliased16((F32*) mWeights, (F32*) src.mWeights, vert_size);            
+            mWeightsScrubbed = src.mWeightsScrubbed;
 		}
 		else
 		{
-			ll_aligned_free_16(mWeights);
-			mWeights = NULL;
-		}
-        mWeightsScrubbed = src.mWeightsScrubbed;
-	}
+			ll_aligned_free_16(mWeights);            
+			mWeights = NULL;            
+            mWeightsScrubbed = FALSE;
+		}   
+
+    #if USE_SEPARATE_JOINT_INDICES_AND_WEIGHTS
+        if (src.mJointIndices)
+        {
+            llassert(!mJointIndices); // don't orphan an old alloc here accidentally
+            allocateJointIndices(src.mNumVertices);
+            LLVector4a::memcpyNonAliased16((F32*) mJointIndices, (F32*) src.mJointIndices, src.mNumVertices * sizeof(U8) * 4);
+        }
+        else*/
+        {
+            ll_aligned_free_16(mJointIndices);
+            mJointIndices = NULL;
+        }     
+    #endif
 
+	}
+    
 	if (mNumIndices)
 	{
 		S32 idx_size = (mNumIndices*sizeof(U16)+0xF) & ~0xF;
 		
 		LLVector4a::memcpyNonAliased16((F32*) mIndices, (F32*) src.mIndices, idx_size);
 	}
-	
+	else
+    {
+        ll_aligned_free_16(mIndices);
+        mIndices = NULL;
+    }
+
 	mOptimized = src.mOptimized;
 
 	//delete 
@@ -4795,6 +4825,13 @@ void LLVolumeFace::freeData()
 	ll_aligned_free_16(mWeights);
 	mWeights = NULL;
 
+#if USE_SEPARATE_JOINT_INDICES_AND_WEIGHTS
+    ll_aligned_free_16(mJointIndices);
+	mJointIndices = NULL;
+    ll_aligned_free_16(mJustWeights);
+	mJustWeights = NULL;
+#endif
+
 	delete mOctree;
 	mOctree = NULL;
 }
@@ -5448,11 +5485,17 @@ bool LLVolumeFace::cacheOptimize()
 	// DO NOT free mNormals and mTexCoords as they are part of mPositions buffer
 	ll_aligned_free_16(mWeights);
 	ll_aligned_free_16(mTangents);
+#if USE_SEPARATE_JOINT_INDICES_AND_WEIGHTS
+    ll_aligned_free_16(mJointIndices);
+    ll_aligned_free_16(mJustWeights);
+    mJustWeights = NULL;
+    mJointIndices = NULL; // filled in later as necessary by skinning code for acceleration
+#endif
 
 	mPositions = pos;
 	mNormals = norm;
 	mTexCoords = tc;
-	mWeights = wght;
+	mWeights = wght;    
 	mTangents = binorm;
 
 	//std::string result = llformat("ACMR pre/post: %.3f/%.3f  --  %d triangles %d breaks", pre_acmr, post_acmr, mNumIndices/3, breaks);
@@ -6362,7 +6405,19 @@ void LLVolumeFace::allocateTangents(S32 num_verts)
 void LLVolumeFace::allocateWeights(S32 num_verts)
 {
 	ll_aligned_free_16(mWeights);
-	mWeights = (LLVector4a*) ll_aligned_malloc_16(sizeof(LLVector4a)*num_verts);
+	mWeights = (LLVector4a*)ll_aligned_malloc_16(sizeof(LLVector4a)*num_verts);
+    
+}
+
+void LLVolumeFace::allocateJointIndices(S32 num_verts)
+{
+#if USE_SEPARATE_JOINT_INDICES_AND_WEIGHTS
+    ll_aligned_free_16(mJointIndices);
+    ll_aligned_free_16(mJustWeights);
+
+    mJointIndices = (U8*)ll_aligned_malloc_16(sizeof(U8) * 4 * num_verts);    
+    mJustWeights = (LLVector4a*)ll_aligned_malloc_16(sizeof(LLVector4a) * num_verts);    
+#endif
 }
 
 void LLVolumeFace::resizeIndices(S32 num_indices)
diff --git a/indra/llmath/llvolume.h b/indra/llmath/llvolume.h
index 1d6d35c432..a77e8c08c6 100644
--- a/indra/llmath/llvolume.h
+++ b/indra/llmath/llvolume.h
@@ -875,6 +875,7 @@ public:
 	void resizeVertices(S32 num_verts);
 	void allocateTangents(S32 num_verts);
 	void allocateWeights(S32 num_verts);
+    void allocateJointIndices(S32 num_verts);
 	void resizeIndices(S32 num_indices);
 	void fillFromLegacyData(std::vector<LLVolumeFace::VertexData>& v, std::vector<U16>& idx);
 
@@ -956,6 +957,11 @@ public:
 	// mWeights.size() should be empty or match mVertices.size()  
 	LLVector4a* mWeights;
 
+#if USE_SEPARATE_JOINT_INDICES_AND_WEIGHTS
+    LLVector4a* mJustWeights;
+    U8* mJointIndices;
+#endif
+
     mutable BOOL mWeightsScrubbed;
 
     // Which joints are rigged to, and the bounding box of any rigged
diff --git a/indra/llprimitive/lldaeloader.cpp b/indra/llprimitive/lldaeloader.cpp
index 8f75d89e5a..139f48fef8 100644
--- a/indra/llprimitive/lldaeloader.cpp
+++ b/indra/llprimitive/lldaeloader.cpp
@@ -1784,7 +1784,7 @@ void LLDAELoader::extractTranslationViaElement( daeElement* pTranslateElement, L
 {
 	if ( pTranslateElement )
 	{
-		domTranslate* pTranslateChild = dynamic_cast<domTranslate*>( pTranslateElement );
+		domTranslate* pTranslateChild = static_cast<domTranslate*>( pTranslateElement );
 		domFloat3 translateChild = pTranslateChild->getValue();
 		LLVector3 singleJointTranslation( translateChild[0], translateChild[1], translateChild[2] );
 		transform.setTranslation( singleJointTranslation );
diff --git a/indra/llrender/CMakeLists.txt b/indra/llrender/CMakeLists.txt
index 589cf86745..47e7ad915b 100644
--- a/indra/llrender/CMakeLists.txt
+++ b/indra/llrender/CMakeLists.txt
@@ -80,6 +80,7 @@ set(llrender_HEADER_FILES
     llshadermgr.h
     lltexture.h
     lluiimage.h
+    lluiimage.inl
     llvertexbuffer.h
     llglcommonfunc.h
     )
diff --git a/indra/llrender/lluiimage.cpp b/indra/llrender/lluiimage.cpp
index 5d8f92b2e6..db69806097 100644
--- a/indra/llrender/lluiimage.cpp
+++ b/indra/llrender/lluiimage.cpp
@@ -31,7 +31,6 @@
 
 // Project includes
 #include "lluiimage.h"
-#include "llrender2dutils.h"
 
 LLUIImage::LLUIImage(const std::string& name, LLPointer<LLTexture> image)
 :	mName(name),
@@ -39,67 +38,29 @@ LLUIImage::LLUIImage(const std::string& name, LLPointer<LLTexture> image)
 	mScaleRegion(0.f, 1.f, 1.f, 0.f),
 	mClipRegion(0.f, 1.f, 1.f, 0.f),
 	mImageLoaded(NULL),
-	mScaleStyle(SCALE_INNER)
-{}
+	mScaleStyle(SCALE_INNER),
+    mCachedW(-1),
+    mCachedH(-1)
+{
+    getTextureWidth();
+    getTextureHeight();
+}
 
 LLUIImage::~LLUIImage()
 {
 	delete mImageLoaded;
 }
 
-void LLUIImage::setClipRegion(const LLRectf& region) 
+S32 LLUIImage::getWidth() const
 { 
-	mClipRegion = region; 
+	// return clipped dimensions of actual image area
+	return ll_round((F32)mImage->getWidth(0) * mClipRegion.getWidth()); 
 }
 
-void LLUIImage::setScaleRegion(const LLRectf& region) 
+S32 LLUIImage::getHeight() const
 { 
-	mScaleRegion = region; 
-}
-
-void LLUIImage::setScaleStyle(LLUIImage::EScaleStyle style)
-{
-	mScaleStyle = style;
-}
-
-//TODO: move drawing implementation inside class
-void LLUIImage::draw(S32 x, S32 y, const LLColor4& color) const
-{
-	draw(x, y, getWidth(), getHeight(), color);
-}
-
-void LLUIImage::draw(S32 x, S32 y, S32 width, S32 height, const LLColor4& color) const
-{
-	gl_draw_scaled_image_with_border(
-		x, y, 
-		width, height, 
-		mImage, 
-		color,
-		FALSE,
-		mClipRegion,
-		mScaleRegion,
-		mScaleStyle == SCALE_INNER);
-}
-
-void LLUIImage::drawSolid(S32 x, S32 y, S32 width, S32 height, const LLColor4& color) const
-{
-	gl_draw_scaled_image_with_border(
-		x, y, 
-		width, height, 
-		mImage, 
-		color, 
-		TRUE,
-		mClipRegion,
-		mScaleRegion,
-		mScaleStyle == SCALE_INNER);
-}
-
-void LLUIImage::drawBorder(S32 x, S32 y, S32 width, S32 height, const LLColor4& color, S32 border_width) const
-{
-	LLRect border_rect;
-	border_rect.setOriginAndSize(x, y, width, height);
-	border_rect.stretch(border_width, border_width);
-	drawSolid(border_rect, color);
+	// return clipped dimensions of actual image area
+	return ll_round((F32)mImage->getHeight(0) * mClipRegion.getHeight()); 
 }
 
 void LLUIImage::draw3D(const LLVector3& origin_agent, const LLVector3& x_axis, const LLVector3& y_axis, 
@@ -145,28 +106,7 @@ void LLUIImage::draw3D(const LLVector3& origin_agent, const LLVector3& x_axis, c
 	} LLRender2D::popMatrix();
 }
 
-
-S32 LLUIImage::getWidth() const
-{ 
-	// return clipped dimensions of actual image area
-	return ll_round((F32)mImage->getWidth(0) * mClipRegion.getWidth()); 
-}
-
-S32 LLUIImage::getHeight() const
-{ 
-	// return clipped dimensions of actual image area
-	return ll_round((F32)mImage->getHeight(0) * mClipRegion.getHeight()); 
-}
-
-S32 LLUIImage::getTextureWidth() const
-{
-	return mImage->getWidth(0);
-}
-
-S32 LLUIImage::getTextureHeight() const
-{
-	return mImage->getHeight(0);
-}
+//#include "lluiimage.inl"
 
 boost::signals2::connection LLUIImage::addLoadedCallback( const image_loaded_signal_t::slot_type& cb ) 
 {
@@ -186,7 +126,6 @@ void LLUIImage::onImageLoaded()
 	}
 }
 
-
 namespace LLInitParam
 {
 	void ParamValue<LLUIImage*>::updateValueFromBlock()
diff --git a/indra/llrender/lluiimage.h b/indra/llrender/lluiimage.h
index 6f47385eb0..e462e19004 100644
--- a/indra/llrender/lluiimage.h
+++ b/indra/llrender/lluiimage.h
@@ -36,6 +36,7 @@
 #include <boost/signals2.hpp>
 #include "llinitparam.h"
 #include "lltexture.h"
+#include "llrender2dutils.h"
 
 extern const LLColor4 UI_VERTEX_COLOR;
 
@@ -53,35 +54,46 @@ public:
 	LLUIImage(const std::string& name, LLPointer<LLTexture> image);
 	virtual ~LLUIImage();
 
-	void setClipRegion(const LLRectf& region);
-	void setScaleRegion(const LLRectf& region);
-	void setScaleStyle(EScaleStyle style);
+	LL_FORCE_INLINE void setClipRegion(const LLRectf& region)
+    { 
+	    mClipRegion = region; 
+    }
 
-	LLPointer<LLTexture> getImage() { return mImage; }
-	const LLPointer<LLTexture>& getImage() const { return mImage; }
+	LL_FORCE_INLINE void setScaleRegion(const LLRectf& region)
+    { 
+	    mScaleRegion = region; 
+    }
 
-	void draw(S32 x, S32 y, S32 width, S32 height, const LLColor4& color = UI_VERTEX_COLOR) const;
-	void draw(S32 x, S32 y, const LLColor4& color = UI_VERTEX_COLOR) const;
-	void draw(const LLRect& rect, const LLColor4& color = UI_VERTEX_COLOR) const { draw(rect.mLeft, rect.mBottom, rect.getWidth(), rect.getHeight(), color); }
+	LL_FORCE_INLINE void setScaleStyle(EScaleStyle style)
+    {
+	    mScaleStyle = style;
+    }
+
+	LL_FORCE_INLINE LLPointer<LLTexture> getImage() { return mImage; }
+	LL_FORCE_INLINE const LLPointer<LLTexture>& getImage() const { return mImage; }
+
+	LL_FORCE_INLINE void draw(S32 x, S32 y, S32 width, S32 height, const LLColor4& color = UI_VERTEX_COLOR) const;
+	LL_FORCE_INLINE void draw(S32 x, S32 y, const LLColor4& color = UI_VERTEX_COLOR) const;
+	LL_FORCE_INLINE void draw(const LLRect& rect, const LLColor4& color = UI_VERTEX_COLOR) const { draw(rect.mLeft, rect.mBottom, rect.getWidth(), rect.getHeight(), color); }
 	
-	void drawSolid(S32 x, S32 y, S32 width, S32 height, const LLColor4& color) const;
-	void drawSolid(const LLRect& rect, const LLColor4& color) const { drawSolid(rect.mLeft, rect.mBottom, rect.getWidth(), rect.getHeight(), color); }
-	void drawSolid(S32 x, S32 y, const LLColor4& color) const { drawSolid(x, y, getWidth(), getHeight(), color); }
+	LL_FORCE_INLINE void drawSolid(S32 x, S32 y, S32 width, S32 height, const LLColor4& color) const;
+	LL_FORCE_INLINE void drawSolid(const LLRect& rect, const LLColor4& color) const { drawSolid(rect.mLeft, rect.mBottom, rect.getWidth(), rect.getHeight(), color); }
+	LL_FORCE_INLINE void drawSolid(S32 x, S32 y, const LLColor4& color) const { drawSolid(x, y, getWidth(), getHeight(), color); }
 
-	void drawBorder(S32 x, S32 y, S32 width, S32 height, const LLColor4& color, S32 border_width) const;
-	void drawBorder(const LLRect& rect, const LLColor4& color, S32 border_width) const { drawBorder(rect.mLeft, rect.mBottom, rect.getWidth(), rect.getHeight(), color, border_width); }
-	void drawBorder(S32 x, S32 y, const LLColor4& color, S32 border_width) const { drawBorder(x, y, getWidth(), getHeight(), color, border_width); }
+	LL_FORCE_INLINE void drawBorder(S32 x, S32 y, S32 width, S32 height, const LLColor4& color, S32 border_width) const;
+	LL_FORCE_INLINE void drawBorder(const LLRect& rect, const LLColor4& color, S32 border_width) const { drawBorder(rect.mLeft, rect.mBottom, rect.getWidth(), rect.getHeight(), color, border_width); }
+	LL_FORCE_INLINE void drawBorder(S32 x, S32 y, const LLColor4& color, S32 border_width) const { drawBorder(x, y, getWidth(), getHeight(), color, border_width); }
 
 	void draw3D(const LLVector3& origin_agent, const LLVector3& x_axis, const LLVector3& y_axis, const LLRect& rect, const LLColor4& color);
 
-	const std::string& getName() const { return mName; }
+	LL_FORCE_INLINE const std::string& getName() const { return mName; }
 
 	virtual S32 getWidth() const;
 	virtual S32 getHeight() const;
 
 	// returns dimensions of underlying textures, which might not be equal to ui image portion
-	S32 getTextureWidth() const;
-	S32 getTextureHeight() const;
+	LL_FORCE_INLINE S32 getTextureWidth() const;
+	LL_FORCE_INLINE S32 getTextureHeight() const;
 
 	boost::signals2::connection addLoadedCallback( const image_loaded_signal_t::slot_type& cb );
 
@@ -95,8 +107,12 @@ protected:
 	LLRectf					mClipRegion;
 	LLPointer<LLTexture>	mImage;
 	EScaleStyle				mScaleStyle;
+    mutable S32             mCachedW;
+    mutable S32             mCachedH;
 };
 
+#include "lluiimage.inl"
+
 namespace LLInitParam
 {
 	template<>
diff --git a/indra/llrender/lluiimage.inl b/indra/llrender/lluiimage.inl
new file mode 100644
index 0000000000..f5227556f0
--- /dev/null
+++ b/indra/llrender/lluiimage.inl
@@ -0,0 +1,77 @@
+/** 
+ * @file lluiimage.inl
+ * @brief UI inline func implementation
+ *
+ * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+void LLUIImage::draw(S32 x, S32 y, const LLColor4& color) const
+{
+	draw(x, y, getWidth(), getHeight(), color);
+}
+
+void LLUIImage::draw(S32 x, S32 y, S32 width, S32 height, const LLColor4& color) const
+{
+	gl_draw_scaled_image_with_border(
+		x, y, 
+		width, height, 
+		mImage, 
+		color,
+		FALSE,
+		mClipRegion,
+		mScaleRegion,
+		mScaleStyle == SCALE_INNER);
+}
+
+void LLUIImage::drawSolid(S32 x, S32 y, S32 width, S32 height, const LLColor4& color) const
+{
+	gl_draw_scaled_image_with_border(
+		x, y, 
+		width, height, 
+		mImage, 
+		color, 
+		TRUE,
+		mClipRegion,
+		mScaleRegion,
+		mScaleStyle == SCALE_INNER);
+}
+
+void LLUIImage::drawBorder(S32 x, S32 y, S32 width, S32 height, const LLColor4& color, S32 border_width) const
+{
+	LLRect border_rect;
+	border_rect.setOriginAndSize(x, y, width, height);
+	border_rect.stretch(border_width, border_width);
+	drawSolid(border_rect, color);
+}
+
+// returns dimensions of underlying textures, which might not be equal to ui image portion
+S32 LLUIImage::getTextureWidth() const
+{
+    mCachedW = (mCachedW == -1) ? getWidth() : mCachedW;
+    return mCachedW;
+}
+
+S32 LLUIImage::getTextureHeight() const
+{
+    mCachedH = (mCachedH == -1) ? getHeight() : mCachedH;
+    return mCachedH;
+}
diff --git a/indra/llxml/llxmltree.cpp b/indra/llxml/llxmltree.cpp
index ca98953f92..ed9c07e1db 100644
--- a/indra/llxml/llxmltree.cpp
+++ b/indra/llxml/llxmltree.cpp
@@ -111,9 +111,11 @@ LLXmlTreeNode::~LLXmlTreeNode()
 	attribute_map_t::iterator iter;
 	for (iter=mAttributes.begin(); iter != mAttributes.end(); iter++)
 		delete iter->second;
-	child_list_t::iterator child_iter;
-	for (child_iter=mChildList.begin(); child_iter != mChildList.end(); child_iter++)
-		delete *child_iter;
+        for(LLXmlTreeNode* node : mChildren)
+        {
+            delete node;
+        }
+        mChildren.clear();
 }
  
 void LLXmlTreeNode::dump( const std::string& prefix )
@@ -149,15 +151,15 @@ void LLXmlTreeNode::addAttribute(const std::string& name, const std::string& val
 
 LLXmlTreeNode*	LLXmlTreeNode::getFirstChild()
 {
-	mChildListIter = mChildList.begin();
+	mChildrenIter = mChildren.begin();
 	return getNextChild();
 }
 LLXmlTreeNode*	LLXmlTreeNode::getNextChild()
 {
-	if (mChildListIter == mChildList.end())
+	if (mChildrenIter == mChildren.end())
 		return 0;
 	else
-		return *mChildListIter++;
+		return *mChildrenIter++;
 }
 
 LLXmlTreeNode* LLXmlTreeNode::getChildByName(const std::string& name)
@@ -184,7 +186,7 @@ void LLXmlTreeNode::appendContents(const std::string& str)
 void LLXmlTreeNode::addChild(LLXmlTreeNode* child)
 {
 	llassert( child );
-	mChildList.push_back( child );
+	mChildren.push_back( child );
 
 	// Add a name mapping to this node
 	LLStdStringHandle tableptr = mTree->mNodeNames.insert(child->mName);
diff --git a/indra/llxml/llxmltree.h b/indra/llxml/llxmltree.h
index a82fee0416..3e425c3870 100644
--- a/indra/llxml/llxmltree.h
+++ b/indra/llxml/llxmltree.h
@@ -151,7 +151,7 @@ public:
 	LLXmlTreeNode*	getParent()							{ return mParent; }
 	LLXmlTreeNode*	getFirstChild();
 	LLXmlTreeNode*	getNextChild();
-	S32				getChildCount()						{ return (S32)mChildList.size(); }
+	S32				getChildCount()						{ return (S32)mChildren.size(); }
 	LLXmlTreeNode*  getChildByName( const std::string& name );	// returns first child with name, NULL if none
 	LLXmlTreeNode*  getNextNamedChild();				// returns next child with name, NULL if none
 
@@ -177,9 +177,9 @@ private:
 	std::string							mName;
 	std::string							mContents;
 	
-	typedef std::list<class LLXmlTreeNode *> child_list_t;
-	child_list_t						mChildList;
-	child_list_t::iterator				mChildListIter;
+	typedef std::vector<class LLXmlTreeNode *> children_t;
+	children_t                          mChildren;
+	children_t::iterator				mChildrenIter;
 	
 	typedef std::multimap<LLStdStringHandle, LLXmlTreeNode *> child_map_t;
 	child_map_t							mChildMap;		// for fast name lookups
diff --git a/indra/newview/app_settings/shaders/class1/deferred/skyV.glsl b/indra/newview/app_settings/shaders/class1/deferred/skyV.glsl
index 5ce246a114..2cd660ab79 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/skyV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/skyV.glsl
@@ -129,8 +129,6 @@ void main()
 	// Add "minimum anti-solar illumination"
 	temp2.x += .25;
 
-    //temp2.x *= sun_moon_glow_factor;
-
     vec4 color = (    blue_horizon * blue_weight * (sunlight + ambient_color)
                 + (haze_horizon * haze_weight) * (sunlight * temp2.x + ambient_color)
              );
diff --git a/indra/newview/app_settings/shaders/class2/windlight/skyV.glsl b/indra/newview/app_settings/shaders/class2/windlight/skyV.glsl
index d81a8feb96..0d141342ce 100644
--- a/indra/newview/app_settings/shaders/class2/windlight/skyV.glsl
+++ b/indra/newview/app_settings/shaders/class2/windlight/skyV.glsl
@@ -54,17 +54,19 @@ uniform float max_y;
 
 uniform vec4 glow;
 uniform float sun_moon_glow_factor;
+
 uniform vec4 cloud_color;
 
 void main()
 {
 
 	// World / view / projection
-	gl_Position = modelview_projection_matrix * vec4(position.xyz, 1.0);
+    vec4 pos = modelview_projection_matrix * vec4(position.xyz, 1.0);
 
+	gl_Position = pos;
+	
 	// Get relative position
 	vec3 P = position.xyz - camPosLocal.xyz + vec3(0,50,0);
-	//vec3 P = position.xyz + vec3(0,50,0);
 
 	// Set altitude
 	if (P.y > 0.)
@@ -78,7 +80,8 @@ void main()
 
 	// Can normalize then
 	vec3 Pn = normalize(P);
-	float  Plen = length(P);
+
+	float Plen = length(P);
 
 	// Initialize temp variables
 	vec4 temp1 = vec4(0.);
@@ -89,29 +92,28 @@ void main()
 	vec4 light_atten;
 
     float dens_mul = density_multiplier;
-    float dist_mul = max(0.05, distance_multiplier);
 
 	// Sunlight attenuation effect (hue and brightness) due to atmosphere
 	// this is used later for sunlight modulation at various altitudes
 	light_atten = (blue_density + vec4(haze_density * 0.25)) * (dens_mul * max_y);
 
 	// Calculate relative weights
-	temp1 = blue_density + haze_density;
+	temp1 = abs(blue_density) + vec4(abs(haze_density));
 	blue_weight = blue_density / temp1;
 	haze_weight = haze_density / temp1;
 
 	// Compute sunlight from P & lightnorm (for long rays like sky)
-	temp2.y = max(0., max(0., Pn.y) * 1.0 + lightnorm.y );
-	temp2.y = 1. / temp2.y;
-	sunlight *= exp( - light_atten * temp2.y);
+    temp2.y = max(0., max(0., Pn.y) * 1.0 + lightnorm.y );
+    temp2.y = 1. / temp2.y;
+    sunlight *= exp( - light_atten * temp2.y);
 
 	// Distance
 	temp2.z = Plen * dens_mul;
 
 	// Transparency (-> temp1)
-	// ATI Bugfix -- can't store temp1*temp2.z in a variable because the ati
-	// compiler gets confused.
-	temp1 = exp(-temp1 * temp2.z);
+    // ATI Bugfix -- can't store temp1*temp2.z in a variable because the ati
+    // compiler gets confused.
+    temp1 = exp(-temp1 * temp2.z);
 
 	// Compute haze glow
 	temp2.x = dot(Pn, lightnorm.xyz);
@@ -124,40 +126,36 @@ void main()
 	temp2.x = pow(temp2.x, glow.z);
 		// glow.z should be negative, so we're doing a sort of (1 / "angle") function
 
-        temp2.x *= sun_moon_glow_factor;
-
 	// Add "minimum anti-solar illumination"
 	temp2.x += .25;
 
+    vec4 color = (    blue_horizon * blue_weight * (sunlight + ambient_color)
+                + (haze_horizon * haze_weight) * (sunlight * temp2.x + ambient_color)
+             );
 
-	// Haze color above cloud
-	vary_HazeColor = (	  blue_horizon * blue_weight * (sunlight + ambient_color)
-				+ (haze_horizon * haze_weight) * (sunlight * temp2.x + ambient_color)
-			 );	
 
+    // Final atmosphere additive
+    color *= (1. - temp1);
 
 	// Increase ambient when there are more clouds
 	vec4 tmpAmbient = ambient_color;
-	tmpAmbient += (1. - tmpAmbient) * cloud_shadow * 0.5; 
+	tmpAmbient += max(vec4(0), (1. - ambient_color)) * cloud_shadow * 0.5; 
 
 	// Dim sunlight by cloud shadow percentage
-	sunlight *= (1. - cloud_shadow);
+	sunlight *= max(0.0, (1. - cloud_shadow));
 
 	// Haze color below cloud
 	vec4 additiveColorBelowCloud = (	  blue_horizon * blue_weight * (sunlight + tmpAmbient)
 				+ (haze_horizon * haze_weight) * (sunlight * temp2.x + tmpAmbient)
 			 );	
 
-	// Final atmosphere additive
-	vary_HazeColor *= (1. - temp1);
-	
 	// Attenuate cloud color by atmosphere
 	temp1 = sqrt(temp1);	//less atmos opacity (more transparency) below clouds
 
 	// At horizon, blend high altitude sky color towards the darker color below the clouds
-	vary_HazeColor += (additiveColorBelowCloud - vary_HazeColor) * (1. - sqrt(temp1));
-	
-	// won't compile on mac without this being set
-	//vary_AtmosAttenuation = vec3(0.0,0.0,0.0);
+	color += (additiveColorBelowCloud - color) * (1. - sqrt(temp1));
+
+    // Haze color above cloud
+	vary_HazeColor = color;	
 }
 
diff --git a/indra/newview/llcontrolavatar.cpp b/indra/newview/llcontrolavatar.cpp
index 1e8ec4fe0f..6da7163f9f 100644
--- a/indra/newview/llcontrolavatar.cpp
+++ b/indra/newview/llcontrolavatar.cpp
@@ -255,7 +255,7 @@ void LLControlAvatar::recursiveScaleJoint(LLJoint* joint, F32 factor)
 {
     joint->setScale(factor * joint->getScale());
     
-	for (LLJoint::child_list_t::iterator iter = joint->mChildren.begin();
+	for (LLJoint::joints_t::iterator iter = joint->mChildren.begin();
 		 iter != joint->mChildren.end(); ++iter)
 	{
 		LLJoint* child = *iter;
diff --git a/indra/newview/lldrawpoolavatar.cpp b/indra/newview/lldrawpoolavatar.cpp
index 15a0595179..789a254389 100644
--- a/indra/newview/lldrawpoolavatar.cpp
+++ b/indra/newview/lldrawpoolavatar.cpp
@@ -38,6 +38,7 @@
 #include "lldrawable.h"
 #include "lldrawpoolbump.h"
 #include "llface.h"
+#include "llvolume.h"
 #include "llmeshrepository.h"
 #include "llsky.h"
 #include "llviewercamera.h"
@@ -1833,15 +1834,13 @@ void LLDrawPoolAvatar::updateRiggedFaceVertexBuffer(
     LLFace* face,
     const LLMeshSkinInfo* skin,
     LLVolume* volume,
-    const LLVolumeFace& vol_face)
+    LLVolumeFace& vol_face)
 {
 	LLVector4a* weights = vol_face.mWeights;
 	if (!weights)
 	{
 		return;
 	}
-    // FIXME ugly const cast
-    LLSkinningUtil::scrubInvalidJoints(avatar, const_cast<LLMeshSkinInfo*>(skin));
 
 	LLPointer<LLVertexBuffer> buffer = face->getVertexBuffer();
 	LLDrawable* drawable = face->getDrawable();
@@ -1851,6 +1850,48 @@ void LLDrawPoolAvatar::updateRiggedFaceVertexBuffer(
 		return;
 	}
 
+    const U32 max_joints = LLSkinningUtil::getMaxJointCount();
+
+#if USE_SEPARATE_JOINT_INDICES_AND_WEIGHTS
+    #define CONDITION_WEIGHT(f) ((U8)llclamp((S32)f, (S32)0, (S32)max_joints-1))
+    LLVector4a* just_weights = vol_face.mJustWeights;
+    // we need to calculate the separated indices and store just the matrix weights for this vol...
+    if (!vol_face.mJointIndices)
+    {
+        // not very consty after all...
+        vol_face.allocateJointIndices(vol_face.mNumVertices);
+        just_weights = vol_face.mJustWeights;
+
+        U8* joint_indices_cursor = vol_face.mJointIndices;
+        for (int i = 0; i < vol_face.mNumVertices; i++)
+        {
+            F32* w = weights[i].getF32ptr();
+            F32* w_ = just_weights[i].getF32ptr();
+
+            F32 w0 = floorf(w[0]);
+            F32 w1 = floorf(w[1]);
+            F32 w2 = floorf(w[2]);
+            F32 w3 = floorf(w[3]);
+
+            joint_indices_cursor[0] = CONDITION_WEIGHT(w0);
+            joint_indices_cursor[1] = CONDITION_WEIGHT(w1);
+            joint_indices_cursor[2] = CONDITION_WEIGHT(w2);
+            joint_indices_cursor[3] = CONDITION_WEIGHT(w3);
+
+            // remove joint portion of combined weight
+            w_[0] = w[0] - w0;
+            w_[1] = w[1] - w1;
+            w_[2] = w[2] - w2;
+            w_[3] = w[3] - w3;
+
+            joint_indices_cursor += 4;
+        }
+    }
+#endif
+
+    // FIXME ugly const cast
+    LLSkinningUtil::scrubInvalidJoints(avatar, const_cast<LLMeshSkinInfo*>(skin));
+
 	U32 data_mask = face->getRiggedVertexBufferDataMask();
 
     if (!vol_face.mWeightsScrubbed)
@@ -1927,29 +1968,67 @@ void LLDrawPoolAvatar::updateRiggedFaceVertexBuffer(
 		LLMatrix4a bind_shape_matrix;
 		bind_shape_matrix.loadu(skin->mBindShapeMatrix);
 
-        const U32 max_joints = LLSkinningUtil::getMaxJointCount();
-		for (U32 j = 0; j < buffer->getNumVerts(); ++j)
-		{
-			LLMatrix4a final_mat;
-            LLSkinningUtil::getPerVertexSkinMatrix(weights[j].getF32ptr(), mat, false, final_mat, max_joints);
-			
-			LLVector4a& v = vol_face.mPositions[j];
-
-			LLVector4a t;
-			LLVector4a dst;
-			bind_shape_matrix.affineTransform(v, t);
-			final_mat.affineTransform(t, dst);
-			pos[j] = dst;
-
-			if (norm)
-			{
-				LLVector4a& n = vol_face.mNormals[j];
-				bind_shape_matrix.rotate(n, t);
-				final_mat.rotate(t, dst);
-				dst.normalize3fast();
-				norm[j] = dst;
-			}
-		}
+#if USE_SEPARATE_JOINT_INDICES_AND_WEIGHTS
+        U8* joint_indices_cursor = vol_face.mJointIndices;
+        // fast path with joint indices separate from weights
+        if (joint_indices_cursor)
+        {
+            LLMatrix4a src[4];
+		    for (U32 j = 0; j < buffer->getNumVerts(); ++j)
+		    {
+			    LLMatrix4a final_mat;
+                //LLMatrix4a final_mat_correct;
+
+                F32* jw = just_weights[j].getF32ptr();
+
+                LLSkinningUtil::getPerVertexSkinMatrixWithIndices(jw, joint_indices_cursor, mat, final_mat, src);                
+
+                joint_indices_cursor += 4;
+
+			    LLVector4a& v = vol_face.mPositions[j];
+
+			    LLVector4a t;
+			    LLVector4a dst;
+			    bind_shape_matrix.affineTransform(v, t);
+			    final_mat.affineTransform(t, dst);
+			    pos[j] = dst;
+
+			    if (norm)
+			    {
+				    LLVector4a& n = vol_face.mNormals[j];
+				    bind_shape_matrix.rotate(n, t);
+				    final_mat.rotate(t, dst);
+				    dst.normalize3fast();
+				    norm[j] = dst;
+			    }
+		    }
+        }
+        // slow path with joint indices calculated from weights
+        else
+#endif
+        {
+            for (U32 j = 0; j < buffer->getNumVerts(); ++j)
+		    {
+			    LLMatrix4a final_mat;
+                LLSkinningUtil::getPerVertexSkinMatrix(weights[j].getF32ptr(), mat, false, final_mat, max_joints);
+
+			    LLVector4a& v = vol_face.mPositions[j];
+			    LLVector4a t;
+			    LLVector4a dst;
+			    bind_shape_matrix.affineTransform(v, t);
+			    final_mat.affineTransform(t, dst);
+			    pos[j] = dst;
+
+			    if (norm)
+			    {
+				    LLVector4a& n = vol_face.mNormals[j];
+				    bind_shape_matrix.rotate(n, t);
+				    final_mat.rotate(t, dst);
+				    //dst.normalize3fast();
+				    norm[j] = dst;
+			    }
+		    }
+        }
 	}
 }
 
@@ -2301,7 +2380,7 @@ void LLDrawPoolAvatar::updateRiggedVertexBuffers(LLVOAvatar* avatar)
 
 			stop_glerror();
 
-			const LLVolumeFace& vol_face = volume->getVolumeFace(te);
+			LLVolumeFace& vol_face = volume->getVolumeFace(te);
 			updateRiggedFaceVertexBuffer(avatar, face, skin, volume, vol_face);
 		}
 	}
diff --git a/indra/newview/lldrawpoolavatar.h b/indra/newview/lldrawpoolavatar.h
index e8add0e1d8..cb09eb18e2 100644
--- a/indra/newview/lldrawpoolavatar.h
+++ b/indra/newview/lldrawpoolavatar.h
@@ -257,7 +257,7 @@ typedef enum
 									  LLFace* facep, 
 									  const LLMeshSkinInfo* skin, 
 									  LLVolume* volume,
-									  const LLVolumeFace& vol_face);
+									  LLVolumeFace& vol_face);
 	void updateRiggedVertexBuffers(LLVOAvatar* avatar);
 
 	void renderRigged(LLVOAvatar* avatar, U32 type, bool glow = false);
diff --git a/indra/newview/lldrawpoolsky.cpp b/indra/newview/lldrawpoolsky.cpp
index 12614b5e2d..dbe8724088 100644
--- a/indra/newview/lldrawpoolsky.cpp
+++ b/indra/newview/lldrawpoolsky.cpp
@@ -111,37 +111,52 @@ void LLDrawPoolSky::render(S32 pass)
 	LLVertexBuffer::unbind();
 	gGL.diffuseColor4f(1,1,1,1);
 
-	for (S32 i = 0; i < llmin(6, face_count); ++i)
+	for (S32 i = 0; i < face_count; ++i)
 	{
-		renderSkyCubeFace(i);
+		renderSkyFace(i);
 	}
 
 	gGL.popMatrix();
 }
 
-void LLDrawPoolSky::renderSkyCubeFace(U8 side)
+void LLDrawPoolSky::renderSkyFace(U8 index)
 {
-	LLFace &face = *mDrawFace[LLVOSky::FACE_SIDE0 + side];
-	if (!face.getGeomCount())
+	LLFace* face = mDrawFace[index];
+
+	if (!face || !face->getGeomCount())
 	{
 		return;
 	}
 
-	llassert(mSkyTex);
-	mSkyTex[side].bindTexture(TRUE);
-
-    gGL.getTexUnit(0)->setTextureColorSpace(LLTexUnit::TCS_SRGB);
-
-	face.renderIndexed();
-
-	if (LLSkyTex::doInterpolate())
-	{
-		
-		LLGLEnable blend(GL_BLEND);
-		mSkyTex[side].bindTexture(FALSE);
-		gGL.diffuseColor4f(1, 1, 1, LLSkyTex::getInterpVal()); // lighting is disabled
-		face.renderIndexed();
-	}
+    F32 interp_val = gSky.mVOSkyp ? gSky.mVOSkyp->getInterpVal() : 0.0f;
+
+    if (index < 6) // sky tex...interp
+    {
+        llassert(mSkyTex);
+	    mSkyTex[index].bindTexture(true); // bind the current tex
+
+        face->renderIndexed();
+
+        if (interp_val > 0.01f) // iff, we've got enough info to lerp (a to and a from)
+	    {
+		    LLGLEnable blend(GL_BLEND);
+            llassert(mSkyTex);
+	        mSkyTex[index].bindTexture(false); // bind the "other" texture
+		    gGL.diffuseColor4f(1, 1, 1, interp_val); // lighting is disabled
+		    face->renderIndexed();
+	    }
+    }
+    else // heavenly body faces, no interp...
+    {
+        LLGLEnable blend(GL_BLEND);
+
+        LLViewerTexture* tex = face->getTexture(LLRender::DIFFUSE_MAP);
+        if (tex)
+        {
+            gGL.getTexUnit(0)->bind(tex, true);
+            face->renderIndexed();
+        }
+    }
 }
 
 void LLDrawPoolSky::endRenderPass( S32 pass )
diff --git a/indra/newview/lldrawpoolsky.h b/indra/newview/lldrawpoolsky.h
index 098bd2134a..916d8c1cbe 100644
--- a/indra/newview/lldrawpoolsky.h
+++ b/indra/newview/lldrawpoolsky.h
@@ -61,7 +61,7 @@ public:
 	/*virtual*/ void endRenderPass(S32 pass);
 	void setSkyTex(LLSkyTex* const st) { mSkyTex = st; }
 
-	void renderSkyCubeFace(U8 side);
+	void renderSkyFace(U8 index);
 	void renderHeavenlyBody(U8 hb, LLFace* face);
 	void renderSunHalo(LLFace* face);
 
diff --git a/indra/newview/lldrawpoolwater.cpp b/indra/newview/lldrawpoolwater.cpp
index 1b5c154378..13420fc001 100644
--- a/indra/newview/lldrawpoolwater.cpp
+++ b/indra/newview/lldrawpoolwater.cpp
@@ -500,6 +500,9 @@ void LLDrawPoolWater::shade2(bool edge, LLGLSLShader* shader, const LLColor3& li
 	    }
 	}
 
+    LLColor4 specular(psky->getIsSunUp() ? psky->getSunlightColor() : psky->getMoonlightColor());
+    shader->uniform4fv(LLShaderMgr::SPECULAR_COLOR, 1, specular.mV);
+
 	sTime = (F32)LLFrameTimer::getElapsedSeconds() * 0.5f;
 	
 	S32 reftex = shader->enableTexture(LLShaderMgr::WATER_REFTEX);
diff --git a/indra/newview/llfloaterland.cpp b/indra/newview/llfloaterland.cpp
index 4a93f1b886..4f147fdb07 100644
--- a/indra/newview/llfloaterland.cpp
+++ b/indra/newview/llfloaterland.cpp
@@ -3319,6 +3319,8 @@ void LLPanelLandEnvironment::refresh()
     if (gDisconnected)
         return;
 
+    commitDayLenOffsetChanges(false); // commit unsaved changes if any
+
     if (!isSameRegion())
     {
         setCrossRegion(true);
diff --git a/indra/newview/llfloaterregioninfo.cpp b/indra/newview/llfloaterregioninfo.cpp
index ab91c34b3d..83215a7fec 100644
--- a/indra/newview/llfloaterregioninfo.cpp
+++ b/indra/newview/llfloaterregioninfo.cpp
@@ -3731,6 +3731,8 @@ BOOL LLPanelRegionEnvironment::postBuild()
 
 void LLPanelRegionEnvironment::refresh()
 {
+    commitDayLenOffsetChanges(false); // commit unsaved changes if any
+
     if (!mCurrentEnvironment)
     {
         if (mCurEnvVersion <= INVALID_PARCEL_ENVIRONMENT_VERSION)
diff --git a/indra/newview/lllegacyatmospherics.cpp b/indra/newview/lllegacyatmospherics.cpp
index 68613be19c..720c7e2388 100644
--- a/indra/newview/lllegacyatmospherics.cpp
+++ b/indra/newview/lllegacyatmospherics.cpp
@@ -242,7 +242,8 @@ LLColor4 LLAtmospherics::calcSkyColorInDir(AtmosphericsVars& vars, const LLVecto
 
 	calcSkyColorWLVert(Pn, vars);
 
-	LLColor3 sky_color =  isShiny ? vars.hazeColor : psky->gammaCorrect(vars.hazeColor * 2.0f);
+	LLColor3 sky_color =  isShiny ? vars.hazeColor : 
+                          !gPipeline.canUseWindLightShaders() ? vars.hazeColor * 2.0f : psky->gammaCorrect(vars.hazeColor * 2.0f);
 
 	if (isShiny)
 	{
@@ -306,6 +307,7 @@ void LLAtmospherics::calcSkyColorWLVert(LLVector3 & Pn, AtmosphericsVars& vars)
 	// this is used later for sunlight modulation at various altitudes
 	LLColor3 light_atten = vars.light_atten;
     LLColor3 light_transmittance = psky->getLightTransmittance(Plen);
+    (void)light_transmittance; // silence Clang warn-error
 
 	// Calculate relative weights
 	LLColor3 temp2(0.f, 0.f, 0.f);
@@ -321,22 +323,18 @@ void LLAtmospherics::calcSkyColorWLVert(LLVector3 & Pn, AtmosphericsVars& vars)
 	}
 
 	// Compute sunlight from P & lightnorm (for long rays like sky)
-    temp2.mV[1] = llmax(F_APPROXIMATELY_ZERO, llmax(0.f, lighty));
-
-    if (temp2.mV[1] > 0.0000001f)
-    {
-	    temp2.mV[1] = 1.f / temp2.mV[1];
-    }
-    temp2.mV[1] = llmax(temp2.mV[1], 0.0000001f);
+    temp2.mV[1] = llmax(F_APPROXIMATELY_ZERO, llmax(0.f, Pn[1]) * 1.0f + sun_norm.mV[1] );
 
+    temp2.mV[1] = 1.f / temp2.mV[1];
     componentMultBy(sunlight, componentExp((light_atten * -1.f) * temp2.mV[1]));
-    componentMultBy(sunlight, light_transmittance);
+    //componentMultBy(sunlight, light_transmittance);
 
     // Distance
 	temp2.mV[2] = Plen * density_multiplier;
 
     // Transparency (-> temp1)
-	temp1 = componentExp((temp1 * -1.f) * temp2.mV[2] * distance_multiplier);
+	temp1 = componentExp((temp1 * -1.f) * temp2.mV[2]);// * distance_multiplier);
+    (void)distance_multiplier;
 
 	// Compute haze glow
 	temp2.mV[0] = Pn * LLVector3(sun_norm);
@@ -347,7 +345,7 @@ void LLAtmospherics::calcSkyColorWLVert(LLVector3 & Pn, AtmosphericsVars& vars)
 		// Set a minimum "angle" (smaller glow.y allows tighter, brighter hotspot)
 
 	// Higher glow.x gives dimmer glow (because next step is 1 / "angle")
-	temp2.mV[0] *= (glow.mV[0] > 0) ? glow.mV[0] : F32_MIN;
+	temp2.mV[0] *= glow.mV[0];
 
 	temp2.mV[0] = pow(temp2.mV[0], glow.mV[2]);
 		// glow.z should be negative, so we're doing a sort of (1 / "angle") function
@@ -374,10 +372,13 @@ void LLAtmospherics::calcSkyColorWLVert(LLVector3 & Pn, AtmosphericsVars& vars)
     final_atten.mV[2] = llmax(final_atten.mV[2], 0.0f);
 
 	// Final atmosphere additive
-	componentMultBy(vars.hazeColor, final_atten);
+	componentMultBy(vars.hazeColor, LLColor3::white - temp1);
+
+    // Attenuate cloud color by atmosphere
+	temp1 = componentSqrt(temp1);	//less atmos opacity (more transparency) below clouds
 
 	// At horizon, blend high altitude sky color towards the darker color below the clouds
-	vars.hazeColor += componentMult(vars.hazeColorBelowCloud - vars.hazeColor, final_atten);
+	vars.hazeColor += componentMult(vars.hazeColorBelowCloud - vars.hazeColor, LLColor3::white - componentSqrt(temp1));
 }
 
 void LLAtmospherics::updateFog(const F32 distance, const LLVector3& tosun_in)
@@ -441,7 +442,7 @@ void LLAtmospherics::updateFog(const F32 distance, const LLVector3& tosun_in)
     vars.density_multiplier = psky->getDensityMultiplier();    
     vars.distance_multiplier = psky->getDistanceMultiplier();
     vars.max_y = psky->getMaxY();
-    vars.sun_norm = LLEnvironment::instance().getLightDirectionCFR();
+    vars.sun_norm = LLEnvironment::instance().getSunDirectionCFR();
     vars.sunlight = psky->getSunlightColor();
     vars.ambient = psky->getAmbientColor();    
     vars.glow = psky->getGlow();
diff --git a/indra/newview/lllegacyatmospherics.h b/indra/newview/lllegacyatmospherics.h
index e304ac3043..95700227f9 100644
--- a/indra/newview/lllegacyatmospherics.h
+++ b/indra/newview/lllegacyatmospherics.h
@@ -206,6 +206,8 @@ public:
     {
     }
 
+    LL_FORCE_INLINE friend bool operator==(const AtmosphericsVars& a, const AtmosphericsVars& b);
+
     LLColor3  hazeColor;
     LLColor3  hazeColorBelowCloud;
 	LLColor3  cloudColorSun;
@@ -231,6 +233,115 @@ public:
     LLColor3 total_density;
 };
 
+bool operator==(const AtmosphericsVars& a, const AtmosphericsVars& b)
+{
+    if (a.hazeColor != b.hazeColor)
+    {
+        return false;
+    }
+
+    if (a.hazeColorBelowCloud != b.hazeColorBelowCloud)
+    {
+        return false;
+    }
+
+    if (a.cloudColorSun != b.cloudColorSun)
+    {
+        return false;
+    }
+
+    if (a.cloudColorAmbient != b.cloudColorAmbient)
+    {
+        return false;
+    }
+
+    if (a.cloudDensity != b.cloudDensity)
+    {
+        return false;
+    }
+
+    if (a.density_multiplier != b.density_multiplier)
+    {
+        return false;
+    }
+
+    if (a.haze_horizon != b.haze_horizon)
+    {
+        return false;
+    }
+
+    if (a.haze_density != b.haze_density)
+    {
+        return false;
+    }
+
+    if (a.blue_horizon != b.blue_horizon)
+    {
+        return false;
+    }
+
+    if (a.blue_density != b.blue_density)
+    {
+        return false;
+    }
+
+    if (a.dome_offset != b.dome_offset)
+    {
+        return false;
+    }
+
+    if (a.dome_radius != b.dome_radius)
+    {
+        return false;
+    }
+
+    if (a.cloud_shadow != b.cloud_shadow)
+    {
+        return false;
+    }
+
+    if (a.glow != b.glow)
+    {
+        return false;
+    }
+
+    if (a.ambient != b.ambient)
+    {
+        return false;
+    }
+
+    if (a.sunlight != b.sunlight)
+    {
+        return false;
+    }
+
+    if (a.sun_norm != b.sun_norm)
+    {
+        return false;
+    }
+
+    if (a.gamma != b.gamma)
+    {
+        return false;
+    }
+
+    if (a.max_y != b.max_y)
+    {
+        return false;
+    }
+
+    if (a.distance_multiplier != b.distance_multiplier)
+    {
+        return false;
+    }
+
+    // light_atten, light_transmittance, total_density
+    // are ignored as they always change when the values above do
+    // they're just shared calc across the sky map generation to save cycles
+
+    return true;
+}
+
 class LLAtmospherics
 {
 public:    
diff --git a/indra/newview/llpanelenvironment.cpp b/indra/newview/llpanelenvironment.cpp
index 554fe6e9bc..d63ae4e434 100644
--- a/indra/newview/llpanelenvironment.cpp
+++ b/indra/newview/llpanelenvironment.cpp
@@ -215,6 +215,8 @@ void LLPanelEnvironmentInfo::onVisibilityChange(BOOL new_visibility)
     }
     else
     {
+        commitDayLenOffsetChanges(false); // arrow-key changes
+
         LLFloaterSettingsPicker *picker = getSettingsPicker(false);
         if (picker)
         {
@@ -718,6 +720,11 @@ void LLPanelEnvironmentInfo::onSldDayOffsetChanged(F32 value)
 
 void LLPanelEnvironmentInfo::onDayLenOffsetMouseUp()
 {
+    commitDayLenOffsetChanges(true);
+}
+
+void LLPanelEnvironmentInfo::commitDayLenOffsetChanges(bool need_callback)
+{
     if (mCurrentEnvironment && (getDirtyFlag() & (DIRTY_FLAG_DAYLENGTH | DIRTY_FLAG_DAYOFFSET)))
     {
         clearDirtyFlag(DIRTY_FLAG_DAYOFFSET);
@@ -725,9 +732,23 @@ void LLPanelEnvironmentInfo::onDayLenOffsetMouseUp()
 
         LLHandle<LLPanel> that_h = getHandle();
 
-        LLEnvironment::instance().updateParcel(getParcelId(), LLSettingsDay::ptr_t(),
-            mCurrentEnvironment->mDayLength.value(), mCurrentEnvironment->mDayOffset.value(), LLEnvironment::altitudes_vect_t(),
-            [that_h](S32 parcel_id, LLEnvironment::EnvironmentInfo::ptr_t envifo) { _onEnvironmentReceived(that_h, parcel_id, envifo); });
+        if (need_callback)
+        {
+            LLEnvironment::instance().updateParcel(getParcelId(),
+                                                   LLSettingsDay::ptr_t(),
+                                                   mCurrentEnvironment->mDayLength.value(),
+                                                   mCurrentEnvironment->mDayOffset.value(),
+                                                   LLEnvironment::altitudes_vect_t(),
+                                                   [that_h](S32 parcel_id, LLEnvironment::EnvironmentInfo::ptr_t envifo) { _onEnvironmentReceived(that_h, parcel_id, envifo); });
+        }
+        else
+        {
+            LLEnvironment::instance().updateParcel(getParcelId(),
+                                                   LLSettingsDay::ptr_t(),
+                                                   mCurrentEnvironment->mDayLength.value(),
+                                                   mCurrentEnvironment->mDayOffset.value(),
+                                                   LLEnvironment::altitudes_vect_t());
+        }
 
     }
 }
@@ -776,6 +797,8 @@ void LLPanelEnvironmentInfo::onAltSliderMouseUp()
     if (isRegion() && (getDirtyFlag() & DIRTY_FLAG_ALTITUDES))
     {
         clearDirtyFlag(DIRTY_FLAG_ALTITUDES);
+        clearDirtyFlag(DIRTY_FLAG_DAYLENGTH);
+        clearDirtyFlag(DIRTY_FLAG_DAYOFFSET);
 
         LLHandle<LLPanel> that_h = getHandle();
         LLEnvironment::altitudes_vect_t alts;
@@ -785,7 +808,11 @@ void LLPanelEnvironmentInfo::onAltSliderMouseUp()
             alts.push_back(alt.second.mAltitude);
         }
         setControlsEnabled(false);
-        LLEnvironment::instance().updateParcel(getParcelId(), LLSettingsDay::ptr_t(), -1, -1, alts);
+        LLEnvironment::instance().updateParcel(getParcelId(),
+                                               LLSettingsDay::ptr_t(),
+                                               mCurrentEnvironment ? mCurrentEnvironment->mDayLength.value() : -1,
+                                               mCurrentEnvironment ? mCurrentEnvironment->mDayOffset.value() : -1,
+                                               alts);
     }
 }
 
@@ -852,14 +879,21 @@ void LLPanelEnvironmentInfo::onBtnRstAltitudes()
         LLHandle<LLPanel> that_h = getHandle();
         LLEnvironment::altitudes_vect_t alts;
 
+        clearDirtyFlag(DIRTY_FLAG_ALTITUDES);
+        clearDirtyFlag(DIRTY_FLAG_DAYLENGTH);
+        clearDirtyFlag(DIRTY_FLAG_DAYOFFSET);
+
         for (S32 idx = 1; idx <= ALTITUDE_SLIDER_COUNT; ++idx)
         {
             F32 new_height = idx * ALTITUDE_DEFAULT_HEIGHT_STEP;
             alts.push_back(new_height);
         }
 
-        LLEnvironment::instance().updateParcel(getParcelId(), LLSettingsDay::ptr_t(),
-            -1, -1, alts,
+        LLEnvironment::instance().updateParcel(getParcelId(),
+                                               LLSettingsDay::ptr_t(),
+                                               mCurrentEnvironment ? mCurrentEnvironment->mDayLength.value() : -1,
+                                               mCurrentEnvironment ? mCurrentEnvironment->mDayOffset.value() : -1,
+                                               alts,
             [that_h](S32 parcel_id, LLEnvironment::EnvironmentInfo::ptr_t envifo) { _onEnvironmentReceived(that_h, parcel_id, envifo); });
     }
 }
@@ -930,11 +964,16 @@ void LLPanelEnvironmentInfo::onPickerCommitted(LLUUID item_id, S32 track_num)
     if (itemp)
     {
         LLHandle<LLPanel> that_h = getHandle();
+        clearDirtyFlag(DIRTY_FLAG_DAYLENGTH);
+        clearDirtyFlag(DIRTY_FLAG_DAYOFFSET);
 
-        LLEnvironment::instance().updateParcel(getParcelId(), itemp->getAssetUUID(),
-            itemp->getName(),
-            track_num,
-            -1, -1, LLEnvironment::altitudes_vect_t(),
+        LLEnvironment::instance().updateParcel(getParcelId(),
+                                               itemp->getAssetUUID(),
+                                               itemp->getName(),
+                                               track_num,
+                                               mCurrentEnvironment ? mCurrentEnvironment->mDayLength.value() : -1,
+                                               mCurrentEnvironment ? mCurrentEnvironment->mDayOffset.value() : -1,
+                                               LLEnvironment::altitudes_vect_t(),
             [that_h](S32 parcel_id, LLEnvironment::EnvironmentInfo::ptr_t envifo) { _onEnvironmentReceived(that_h, parcel_id, envifo); });
     }
 }
@@ -960,9 +999,14 @@ void LLPanelEnvironmentInfo::onEditCommitted(LLSettingsDay::ptr_t newday)
     if (newhash != oldhash)
     {
         LLHandle<LLPanel> that_h = getHandle();
+        clearDirtyFlag(DIRTY_FLAG_DAYLENGTH);
+        clearDirtyFlag(DIRTY_FLAG_DAYOFFSET);
 
-        LLEnvironment::instance().updateParcel(getParcelId(), newday,
-            -1, -1, LLEnvironment::altitudes_vect_t(),
+        LLEnvironment::instance().updateParcel(getParcelId(),
+                                               newday,
+                                               mCurrentEnvironment ? mCurrentEnvironment->mDayLength.value() : -1,
+                                               mCurrentEnvironment ? mCurrentEnvironment->mDayOffset.value() : -1,
+                                               LLEnvironment::altitudes_vect_t(),
             [that_h](S32 parcel_id, LLEnvironment::EnvironmentInfo::ptr_t envifo) { _onEnvironmentReceived(that_h, parcel_id, envifo); });
     }
 }
diff --git a/indra/newview/llpanelenvironment.h b/indra/newview/llpanelenvironment.h
index 9eb4040758..50ec1165be 100644
--- a/indra/newview/llpanelenvironment.h
+++ b/indra/newview/llpanelenvironment.h
@@ -126,6 +126,7 @@ protected:
     void                        onPickerCommitted(LLUUID item_id, S32 track_num = LLEnvironment::NO_TRACK);
     void                        onEditCommitted(LLSettingsDay::ptr_t newday);
     void                        onDayLenOffsetMouseUp();
+    void                        commitDayLenOffsetChanges(bool need_callback);
 
     void                        onPickerAssetDownloaded(LLSettingsBase::ptr_t settings);
     void                        onEnvironmentReceived(S32 parcel_id, LLEnvironment::EnvironmentInfo::ptr_t envifo);
diff --git a/indra/newview/llskinningutil.cpp b/indra/newview/llskinningutil.cpp
index 0fa4c2b114..83b9c8971a 100644
--- a/indra/newview/llskinningutil.cpp
+++ b/indra/newview/llskinningutil.cpp
@@ -34,8 +34,12 @@
 #include "llvolume.h"
 #include "llrigginginfo.h"
 
+#define DEBUG_SKINNING  LL_DEBUG
+#define MAT_USE_SSE     1
+
 void dump_avatar_and_skin_state(const std::string& reason, LLVOAvatar *avatar, const LLMeshSkinInfo *skin)
 {
+#if DEBUG_SKINNING
     static S32 dump_count = 0;
     const S32 max_dump = 10;
 
@@ -81,16 +85,16 @@ void dump_avatar_and_skin_state(const std::string& reason, LLVOAvatar *avatar, c
 
         dump_count++;
     }
+#endif
 }
 
 void LLSkinningUtil::initClass()
 {
 }
 
-U32 LLSkinningUtil::getMaxJointCount()
+S32 LLSkinningUtil::getMaxJointCount()
 {
-    U32 result = LL_MAX_JOINTS_PER_MESH_OBJECT;
-	return result;
+    return (S32)LL_MAX_JOINTS_PER_MESH_OBJECT;
 }
 
 U32 LLSkinningUtil::getMeshJointCount(const LLMeshSkinInfo *skin)
@@ -120,6 +124,8 @@ void LLSkinningUtil::scrubInvalidJoints(LLVOAvatar *avatar, LLMeshSkinInfo* skin
     skin->mInvalidJointsScrubbed = true;
 }
 
+#define MAT_USE_SSE 1
+
 void LLSkinningUtil::initSkinningMatrixPalette(
     LLMatrix4* mat,
     S32 count, 
@@ -130,9 +136,9 @@ void LLSkinningUtil::initSkinningMatrixPalette(
     for (U32 j = 0; j < count; ++j)
     {
         LLJoint *joint = avatar->getJoint(skin->mJointNums[j]);
+        llassert(joint);
         if (joint)
         {
-#define MAT_USE_SSE
 #ifdef MAT_USE_SSE
             LLMatrix4a bind, world, res;
             bind.loadu(skin->mInvBindMatrix[j]);
@@ -147,6 +153,7 @@ void LLSkinningUtil::initSkinningMatrixPalette(
         else
         {
             mat[j] = skin->mInvBindMatrix[j];
+#if DEBUG_SKINNING
             // This  shouldn't  happen   -  in  mesh  upload,  skinned
             // rendering  should  be disabled  unless  all joints  are
             // valid.  In other  cases of  skinned  rendering, invalid
@@ -157,16 +164,15 @@ void LLSkinningUtil::initSkinningMatrixPalette(
             LL_WARNS_ONCE("Avatar") << avatar->getFullname() 
                                     << " avatar build state: isBuilt() " << avatar->isBuilt() 
                                     << " mInitFlags " << avatar->mInitFlags << LL_ENDL;
-#if 0
-            dump_avatar_and_skin_state("initSkinningMatrixPalette joint not found", avatar, skin);
 #endif
+            dump_avatar_and_skin_state("initSkinningMatrixPalette joint not found", avatar, skin);
         }
     }
 }
 
 void LLSkinningUtil::checkSkinWeights(LLVector4a* weights, U32 num_vertices, const LLMeshSkinInfo* skin)
 {
-#ifdef SHOW_ASSERT                  // same condition that controls llassert()
+#if DEBUG_SKINNING
 	const S32 max_joints = skin->mJointNames.size();
     for (U32 j=0; j<num_vertices; j++)
     {
@@ -265,6 +271,7 @@ void LLSkinningUtil::initJointNums(LLMeshSkinInfo* skin, LLVOAvatar *avatar)
     {
         for (U32 j = 0; j < skin->mJointNames.size(); ++j)
         {
+    #if DEBUG_SKINNING     
             LLJoint *joint = NULL;
             if (skin->mJointNums[j] == -1)
             {
@@ -282,11 +289,16 @@ void LLSkinningUtil::initJointNums(LLMeshSkinInfo* skin, LLVOAvatar *avatar)
                 {
                     LL_WARNS_ONCE("Avatar") << avatar->getFullname() << " unable to find joint " << skin->mJointNames[j] << LL_ENDL;
                     LL_WARNS_ONCE("Avatar") << avatar->getFullname() << " avatar build state: isBuilt() " << avatar->isBuilt() << " mInitFlags " << avatar->mInitFlags << LL_ENDL;
-#if 0
                     dump_avatar_and_skin_state("initJointNums joint not found", avatar, skin);
-#endif
+                    skin->mJointNums[j] = 0;
                 }
             }
+    #else
+            LLJoint *joint = (skin->mJointNums[j] == -1) ? avatar->getJoint(skin->mJointNames[j]) : avatar->getJoint(skin->mJointNums[j]);
+            skin->mJointNums[j] = joint ? joint->getJointNum() : 0;            
+    #endif
+            // insure we have *a* valid joint to reference
+            llassert(skin->mJointNums[j] >= 0);
         }
         skin->mJointNumsInitialized = true;
     }
@@ -344,14 +356,17 @@ void LLSkinningUtil::updateRiggingInfo(const LLMeshSkinInfo* skin, LLVOAvatar *a
 
                                 // FIXME could precompute these matMuls.
                                 LLMatrix4a bind_shape;
-                                bind_shape.loadu(skin->mBindShapeMatrix);
                                 LLMatrix4a inv_bind;
-                                inv_bind.loadu(skin->mInvBindMatrix[joint_index]);
                                 LLMatrix4a mat;
-                                matMul(bind_shape, inv_bind, mat);
                                 LLVector4a pos_joint_space;
+
+                                bind_shape.loadu(skin->mBindShapeMatrix);
+                                inv_bind.loadu(skin->mInvBindMatrix[joint_index]);
+                                matMul(bind_shape, inv_bind, mat);
+
                                 mat.affineTransform(pos, pos_joint_space);
                                 pos_joint_space.mul(wght[k]);
+
                                 LLVector4a *extents = rig_info_tab[joint_num].getRiggedExtents();
                                 update_min_max(extents[0], extents[1], pos_joint_space);
                             }
@@ -366,6 +381,8 @@ void LLSkinningUtil::updateRiggingInfo(const LLMeshSkinInfo* skin, LLVOAvatar *a
                 vol_face.mJointRiggingInfoTab.setNeedsUpdate(false);
             }
         }
+
+#if DEBUG_SKINNING
         if (vol_face.mJointRiggingInfoTab.size()!=0)
         {
             LL_DEBUGS("RigSpammish") << "we have rigging info for vf " << &vol_face 
@@ -376,10 +393,40 @@ void LLSkinningUtil::updateRiggingInfo(const LLMeshSkinInfo* skin, LLVOAvatar *a
             LL_DEBUGS("RigSpammish") << "no rigging info for vf " << &vol_face 
                                      << " num_verts " << vol_face.mNumVertices << LL_ENDL; 
         }
+#endif
 
     }
 }
 
+void LLSkinningUtil::updateRiggingInfo_(LLMeshSkinInfo* skin, LLVOAvatar *avatar, S32 num_verts, LLVector4a* weights, LLVector4a* positions, U8* joint_indices, LLJointRiggingInfoTab &rig_info_tab)
+{
+    LL_RECORD_BLOCK_TIME(FTM_FACE_RIGGING_INFO);
+    for (S32 i=0; i < num_verts; i++)
+    {
+        LLVector4a& pos  = positions[i];
+        LLVector4a& wght = weights[i];
+        for (U32 k=0; k<4; ++k)
+        {
+            S32 joint_num = skin->mJointNums[joint_indices[k]];
+            llassert(joint_num >= 0 && joint_num < LL_CHARACTER_MAX_ANIMATED_JOINTS);
+            {
+                rig_info_tab[joint_num].setIsRiggedTo(true);
+                LLMatrix4a bind_shape;
+                bind_shape.loadu(skin->mBindShapeMatrix);
+                LLMatrix4a inv_bind;
+                inv_bind.loadu(skin->mInvBindMatrix[joint_indices[k]]);
+                LLMatrix4a mat;
+                matMul(bind_shape, inv_bind, mat);
+                LLVector4a pos_joint_space;
+                mat.affineTransform(pos, pos_joint_space);
+                pos_joint_space.mul(wght[k]);
+                LLVector4a *extents = rig_info_tab[joint_num].getRiggedExtents();
+                update_min_max(extents[0], extents[1], pos_joint_space);
+            }
+        }
+    }
+}
+
 // This is used for extracting rotation from a bind shape matrix that
 // already has scales baked in
 LLQuaternion LLSkinningUtil::getUnscaledQuaternion(const LLMatrix4& mat4)
diff --git a/indra/newview/llskinningutil.h b/indra/newview/llskinningutil.h
index ccc501adc0..d39356451d 100644
--- a/indra/newview/llskinningutil.h
+++ b/indra/newview/llskinningutil.h
@@ -27,23 +27,48 @@
 #ifndef LLSKINNINGUTIL_H
 #define LLSKINNINGUTIL_H
 
+#include "v2math.h"
+#include "v4math.h"
+#include "llvector4a.h"
+#include "llmatrix4a.h"
+
 class LLVOAvatar;
 class LLMeshSkinInfo;
-class LLMatrix4a;
 class LLVolumeFace;
+class LLJointRiggingInfoTab;
 
 namespace LLSkinningUtil
 {
     void initClass();
-    U32 getMaxJointCount();
+    S32 getMaxJointCount();
     U32 getMeshJointCount(const LLMeshSkinInfo *skin);
     void scrubInvalidJoints(LLVOAvatar *avatar, LLMeshSkinInfo* skin);
     void initSkinningMatrixPalette(LLMatrix4* mat, S32 count, const LLMeshSkinInfo* skin, LLVOAvatar *avatar);
     void checkSkinWeights(LLVector4a* weights, U32 num_vertices, const LLMeshSkinInfo* skin);
     void scrubSkinWeights(LLVector4a* weights, U32 num_vertices, const LLMeshSkinInfo* skin);
     void getPerVertexSkinMatrix(F32* weights, LLMatrix4a* mat, bool handle_bad_scale, LLMatrix4a& final_mat, U32 max_joints);
+
+    LL_FORCE_INLINE void getPerVertexSkinMatrixWithIndices(
+        F32*        weights,
+        U8*         idx,
+        LLMatrix4a* mat,
+        LLMatrix4a& final_mat,
+        LLMatrix4a* src)
+    {    
+        final_mat.clear();
+        src[0].setMul(mat[idx[0]], weights[0]);
+        src[1].setMul(mat[idx[1]], weights[1]);
+        final_mat.add(src[0]);
+        final_mat.add(src[1]);
+        src[2].setMul(mat[idx[2]], weights[2]);        
+        src[3].setMul(mat[idx[3]], weights[3]);
+        final_mat.add(src[2]);
+        final_mat.add(src[3]);
+    }
+
     void initJointNums(LLMeshSkinInfo* skin, LLVOAvatar *avatar);
     void updateRiggingInfo(const LLMeshSkinInfo* skin, LLVOAvatar *avatar, LLVolumeFace& vol_face);
+    void updateRiggingInfo_(LLMeshSkinInfo* skin, LLVOAvatar *avatar, S32 num_verts, LLVector4a* weights, LLVector4a* positions, U8* joint_indices, LLJointRiggingInfoTab &rig_info_tab);
 	LLQuaternion getUnscaledQuaternion(const LLMatrix4& mat4);
 };
 
diff --git a/indra/newview/llviewerdisplay.cpp b/indra/newview/llviewerdisplay.cpp
index b78937e3b0..ddce419f19 100644
--- a/indra/newview/llviewerdisplay.cpp
+++ b/indra/newview/llviewerdisplay.cpp
@@ -196,9 +196,6 @@ void display_update_camera()
 	LLViewerCamera::getInstance()->setFar(final_far);
 	gViewerWindow->setup3DRender();
 	
-	// update all the sky/atmospheric/water settings
-    LLEnvironment::instance().update(LLViewerCamera::getInstance());
-
 	// Update land visibility too
 	LLWorld::getInstance()->setLandFarClip(final_far);
 }
@@ -245,6 +242,7 @@ static LLTrace::BlockTimerStatHandle FTM_HUD_UPDATE("HUD Update");
 static LLTrace::BlockTimerStatHandle FTM_DISPLAY_UPDATE_GEOM("Update Geom");
 static LLTrace::BlockTimerStatHandle FTM_TEXTURE_UNBIND("Texture Unbind");
 static LLTrace::BlockTimerStatHandle FTM_TELEPORT_DISPLAY("Teleport Display");
+static LLTrace::BlockTimerStatHandle FTM_EEP_UPDATE("Env Update");
 
 // Paint the display!
 void display(BOOL rebuild, F32 zoom_factor, int subfield, BOOL for_snapshot)
@@ -627,7 +625,13 @@ void display(BOOL rebuild, F32 zoom_factor, int subfield, BOOL for_snapshot)
 		stop_glerror();
 		display_update_camera();
 		stop_glerror();
-				
+
+		{
+			LL_RECORD_BLOCK_TIME(FTM_EEP_UPDATE);
+            // update all the sky/atmospheric/water settings
+            LLEnvironment::instance().update(LLViewerCamera::getInstance());
+		}
+
 		// *TODO: merge these two methods
 		{
 			LL_RECORD_BLOCK_TIME(FTM_HUD_UPDATE);
diff --git a/indra/newview/llviewerjoint.cpp b/indra/newview/llviewerjoint.cpp
index b7bd131246..a448a95904 100644
--- a/indra/newview/llviewerjoint.cpp
+++ b/indra/newview/llviewerjoint.cpp
@@ -141,11 +141,10 @@ U32 LLViewerJoint::render( F32 pixelArea, BOOL first_pass, BOOL is_dummy )
 	//----------------------------------------------------------------
 	// render children
 	//----------------------------------------------------------------
-	for (child_list_t::iterator iter = mChildren.begin();
-		 iter != mChildren.end(); ++iter)
+	for (LLJoint* j : mChildren)
 	{
-		LLAvatarJoint* joint = dynamic_cast<LLAvatarJoint*>(*iter);
-		F32 jointLOD = joint->getLOD();
+		LLAvatarJoint* joint = dynamic_cast<LLAvatarJoint*>(j);
+		F32 jointLOD = joint ? joint->getLOD() : 0;
 		if (pixelArea >= jointLOD || sDisableLOD)
 		{
 			triangle_count += joint->render( pixelArea, TRUE, is_dummy );
diff --git a/indra/newview/llvosky.cpp b/indra/newview/llvosky.cpp
index ad452659c6..78c782eb5f 100644
--- a/indra/newview/llvosky.cpp
+++ b/indra/newview/llvosky.cpp
@@ -90,7 +90,6 @@ namespace
 
 S32 LLSkyTex::sComponents = 4;
 S32 LLSkyTex::sResolution = 64;
-F32 LLSkyTex::sInterpVal = 0.f;
 S32 LLSkyTex::sCurrent = 0;
 
 
@@ -479,8 +478,8 @@ void LLVOSky::init()
     m_atmosphericsVars.haze_horizon = psky->getHazeHorizon();
     m_atmosphericsVars.density_multiplier = psky->getDensityMultiplier();
     m_atmosphericsVars.max_y = psky->getMaxY();
-    m_atmosphericsVars.sun_norm = LLEnvironment::instance().getClampedLightNorm();
-    m_atmosphericsVars.sunlight = psky->getSunlightColor();
+    m_atmosphericsVars.sun_norm = LLEnvironment::instance().getClampedSunNorm();
+    m_atmosphericsVars.sunlight = psky->getIsSunUp() ? psky->getSunlightColor() : psky->getMoonlightColor();
     m_atmosphericsVars.ambient = psky->getAmbientColor();    
     m_atmosphericsVars.glow = psky->getGlow();
     m_atmosphericsVars.cloud_shadow = psky->getCloudShadow();
@@ -531,8 +530,8 @@ void LLVOSky::calc()
     m_atmosphericsVars.density_multiplier = psky->getDensityMultiplier();
     m_atmosphericsVars.distance_multiplier = psky->getDistanceMultiplier();
     m_atmosphericsVars.max_y = psky->getMaxY();
-    m_atmosphericsVars.sun_norm = LLEnvironment::instance().getClampedLightNorm();
-    m_atmosphericsVars.sunlight = psky->getSunlightColor();
+    m_atmosphericsVars.sun_norm = LLEnvironment::instance().getClampedSunNorm();
+    m_atmosphericsVars.sunlight = psky->getIsSunUp() ? psky->getSunlightColor() : psky->getMoonlightColor();
     m_atmosphericsVars.ambient = psky->getAmbientColor();    
     m_atmosphericsVars.glow = psky->getGlow();
     m_atmosphericsVars.cloud_shadow = psky->getCloudShadow();
@@ -725,8 +724,6 @@ bool LLVOSky::updateSky()
 	next_frame = next_frame % cycle_frame_no;
 
 	mInterpVal = (!mInitialized) ? 1 : (F32)next_frame / cycle_frame_no;
-	// sInterpVal = (F32)next_frame / cycle_frame_no;
-	LLSkyTex::setInterpVal( mInterpVal );
 	LLHeavenBody::setInterpVal( mInterpVal );
 	updateDirections();
 
@@ -753,7 +750,9 @@ bool LLVOSky::updateSky()
 
     calc();
 
-    if (mForceUpdate && mForceUpdateThrottle.hasExpired())
+    bool same_atmospherics = m_lastAtmosphericsVars == m_atmosphericsVars;
+
+    if (mForceUpdate && mForceUpdateThrottle.hasExpired() && !same_atmospherics)
 	{
         LL_RECORD_BLOCK_TIME(FTM_VOSKY_UPDATEFORCED);
 
@@ -761,6 +760,8 @@ bool LLVOSky::updateSky()
 
 		LLSkyTex::stepCurrent();
 		
+        m_lastAtmosphericsVars = m_atmosphericsVars;
+
 		if (!direction.isExactlyZero())
 		{
             mLastTotalAmbient = total_ambient;
@@ -912,6 +913,8 @@ void LLVOSky::setSunTextures(const LLUUID& sun_texture, const LLUUID& sun_textur
     mSunTexturep[0] = sun_texture.isNull() ? nullptr : LLViewerTextureManager::getFetchedTexture(sun_texture, FTT_DEFAULT, TRUE, LLGLTexture::BOOST_UI);
     mSunTexturep[1] = sun_texture_next.isNull() ? nullptr : LLViewerTextureManager::getFetchedTexture(sun_texture_next, FTT_DEFAULT, TRUE, LLGLTexture::BOOST_UI);
 
+    bool can_use_wl = gPipeline.canUseWindLightShaders();
+
     if (mFace[FACE_SUN])
     {
         if (mSunTexturep[0])
@@ -934,11 +937,14 @@ void LLVOSky::setSunTextures(const LLUUID& sun_texture, const LLUUID& sun_textur
 
         mFace[FACE_SUN]->setTexture(LLRender::DIFFUSE_MAP, mSunTexturep[0]);
 
-        if (mSunTexturep[1])
+        if (can_use_wl)
         {
-	        mSunTexturep[1]->setAddressMode(LLTexUnit::TAM_CLAMP);            
+            if (mSunTexturep[1])
+            {
+	            mSunTexturep[1]->setAddressMode(LLTexUnit::TAM_CLAMP);            
+            }
+            mFace[FACE_SUN]->setTexture(LLRender::ALTERNATE_DIFFUSE_MAP, mSunTexturep[1]);
         }
-        mFace[FACE_SUN]->setTexture(LLRender::ALTERNATE_DIFFUSE_MAP, mSunTexturep[1]);
     }
 }
 
@@ -946,6 +952,8 @@ void LLVOSky::setMoonTextures(const LLUUID& moon_texture, const LLUUID& moon_tex
 {
     LLSettingsSky::ptr_t psky = LLEnvironment::instance().getCurrentSky();
 
+    bool can_use_wl = gPipeline.canUseWindLightShaders();
+
     mMoonTexturep[0] = moon_texture.isNull()      ? nullptr : LLViewerTextureManager::getFetchedTexture(moon_texture, FTT_DEFAULT, TRUE, LLGLTexture::BOOST_UI);
     mMoonTexturep[1] = moon_texture_next.isNull() ? nullptr : LLViewerTextureManager::getFetchedTexture(moon_texture_next, FTT_DEFAULT, TRUE, LLGLTexture::BOOST_UI);
 
@@ -957,7 +965,7 @@ void LLVOSky::setMoonTextures(const LLUUID& moon_texture, const LLUUID& moon_tex
         }
         mFace[FACE_MOON]->setTexture(LLRender::DIFFUSE_MAP, mMoonTexturep[0]);
     
-        if (mMoonTexturep[1])
+        if (mMoonTexturep[1] && can_use_wl)
         {
 	        mMoonTexturep[1]->setAddressMode(LLTexUnit::TAM_CLAMP);
             mFace[FACE_MOON]->setTexture(LLRender::ALTERNATE_DIFFUSE_MAP, mMoonTexturep[1]);
diff --git a/indra/newview/llvosky.h b/indra/newview/llvosky.h
index 8c2817e1ed..5f27085599 100644
--- a/indra/newview/llvosky.h
+++ b/indra/newview/llvosky.h
@@ -57,13 +57,8 @@ private:
 	LLColor4		*mSkyData;
 	LLVector3		*mSkyDirs;			// Cache of sky direction vectors
 	static S32		sCurrent;
-	static F32		sInterpVal;
 
 public:
-	static F32 getInterpVal()					{ return sInterpVal; }
-	static void setInterpVal(const F32 v)		{ sInterpVal = v; }
-	static BOOL doInterpolate()					{ return sInterpVal > 0.001f; }
-
 	void bindTexture(BOOL curr = TRUE);
 	
 protected:
@@ -299,6 +294,8 @@ public:
 	LLFace	*mFace[FACE_COUNT];
 	LLVector3	mBumpSunDir;
 
+    F32 getInterpVal() const { return mInterpVal; }
+
 protected:
 	~LLVOSky();
 
diff --git a/indra/newview/llvovolume.cpp b/indra/newview/llvovolume.cpp
index 9fa29abc4d..706e2c6895 100644
--- a/indra/newview/llvovolume.cpp
+++ b/indra/newview/llvovolume.cpp
@@ -4787,18 +4787,44 @@ void LLRiggedVolume::update(const LLMeshSkinInfo* skin, LLVOAvatar* avatar, cons
                 U32 max_joints = LLSkinningUtil::getMaxJointCount();
                 rigged_vert_count += dst_face.mNumVertices;
                 rigged_face_count++;
-				for (U32 j = 0; j < dst_face.mNumVertices; ++j)
-				{
-					LLMatrix4a final_mat;
-                    LLSkinningUtil::getPerVertexSkinMatrix(weight[j].getF32ptr(), mat, false, final_mat, max_joints);
+
+            #if USE_SEPARATE_JOINT_INDICES_AND_WEIGHTS
+                if (vol_face.mJointIndices) // fast path with preconditioned joint indices
+                {
+                    LLMatrix4a src[4];
+                    U8* joint_indices_cursor = vol_face.mJointIndices;
+                    LLVector4a* just_weights = vol_face.mJustWeights;
+                    for (U32 j = 0; j < dst_face.mNumVertices; ++j)
+				    {
+					    LLMatrix4a final_mat;
+                        F32* w = just_weights[j].getF32ptr();
+                        LLSkinningUtil::getPerVertexSkinMatrixWithIndices(w, joint_indices_cursor, mat, final_mat, src);
+                        joint_indices_cursor += 4;
+
+					    LLVector4a& v = vol_face.mPositions[j];
+					    LLVector4a t;
+					    LLVector4a dst;
+					    bind_shape_matrix.affineTransform(v, t);
+					    final_mat.affineTransform(t, dst);
+					    pos[j] = dst;
+				    }
+                }
+                else
+            #endif
+                {
+				    for (U32 j = 0; j < dst_face.mNumVertices; ++j)
+				    {
+					    LLMatrix4a final_mat;
+                        LLSkinningUtil::getPerVertexSkinMatrix(weight[j].getF32ptr(), mat, false, final_mat, max_joints);
 				
-					LLVector4a& v = vol_face.mPositions[j];
-					LLVector4a t;
-					LLVector4a dst;
-					bind_shape_matrix.affineTransform(v, t);
-					final_mat.affineTransform(t, dst);
-					pos[j] = dst;
-				}
+					    LLVector4a& v = vol_face.mPositions[j];
+					    LLVector4a t;
+					    LLVector4a dst;
+					    bind_shape_matrix.affineTransform(v, t);
+					    final_mat.affineTransform(t, dst);
+					    pos[j] = dst;
+				    }
+                }
 
 				//update bounding box
 				// VFExtents change
@@ -5546,11 +5572,6 @@ void LLVolumeGeometryManager::rebuildGeom(LLSpatialGroup* group)
 								U32 mask = mat->getShaderMask(alpha_mode);
 								pool->addRiggedFace(facep, mask);
 							}
-
-							if(vobj->isAnimatedObject() && vobj->isRiggedMesh())
-							{
-								pool->updateRiggedVertexBuffers(vobj->getAvatar());
-							}
 						}
 						else if (mat)
 						{