3 files changed, 37 insertions, 15 deletions
diff --git a/indra/llmath/llvolume.cpp b/indra/llmath/llvolume.cpp
index 91e463cc32..0e3792fda3 100644
--- a/indra/llmath/llvolume.cpp
+++ b/indra/llmath/llvolume.cpp
@@ -2056,7 +2056,8 @@ LLVolume::LLVolume(const LLVolumeParams &params, const F32 detail, const BOOL ge
 	mDetail = detail;
 	mSculptLevel = -2;
 	mSurfaceArea = 1.f; //only calculated for sculpts, defaults to 1 for all other prims
-	mIsMeshAssetLoaded = FALSE;
+	mIsMeshAssetLoaded = false;
+    mIsMeshAssetUnavaliable = false;
 	mLODScaleBias.setVec(1,1,1);
 	mHullPoints = NULL;
 	mHullIndices = NULL;
@@ -2804,14 +2805,32 @@ bool LLVolume::unpackVolumeFacesInternal(const LLSD& mdl)
 }
 
 
-BOOL LLVolume::isMeshAssetLoaded()
+bool LLVolume::isMeshAssetLoaded()
 {
 	return mIsMeshAssetLoaded;
 }
 
-void LLVolume::setMeshAssetLoaded(BOOL loaded)
+void LLVolume::setMeshAssetLoaded(bool loaded)
 {
 	mIsMeshAssetLoaded = loaded;
+    if (loaded)
+    {
+        mIsMeshAssetUnavaliable = false;
+    }
+}
+
+void LLVolume::setMeshAssetUnavaliable(bool unavaliable)
+{
+    // Don't set it if at least one lod loaded
+    if (!mIsMeshAssetLoaded)
+    {
+        mIsMeshAssetUnavaliable = unavaliable;
+    }
+}
+
+bool LLVolume::isMeshAssetUnavaliable()
+{
+    return mIsMeshAssetUnavaliable;
 }
 
 void LLVolume::copyFacesTo(std::vector<LLVolumeFace> &faces) const 
diff --git a/indra/llmath/llvolume.h b/indra/llmath/llvolume.h
index ad6a669531..afed98ff36 100644
--- a/indra/llmath/llvolume.h
+++ b/indra/llmath/llvolume.h
@@ -1111,15 +1111,18 @@ private:
 	bool unpackVolumeFacesInternal(const LLSD& mdl);
 
 public:
-	virtual void setMeshAssetLoaded(BOOL loaded);
-	virtual BOOL isMeshAssetLoaded();
+	virtual void setMeshAssetLoaded(bool loaded);
+	virtual bool isMeshAssetLoaded();
+    virtual void setMeshAssetUnavaliable(bool unavaliable);
+    virtual bool isMeshAssetUnavaliable();
 
  protected:
 	BOOL mUnique;
 	F32 mDetail;
 	S32 mSculptLevel;
 	F32 mSurfaceArea; //unscaled surface area
-	BOOL mIsMeshAssetLoaded;
+	bool mIsMeshAssetLoaded;
+    bool mIsMeshAssetUnavaliable;
 	
 	const LLVolumeParams mParams;
 	LLPath *mPathp;
diff --git a/indra/llmath/llvolumemgr.cpp b/indra/llmath/llvolumemgr.cpp
index 89cdb1c6b9..9399504529 100644
--- a/indra/llmath/llvolumemgr.cpp
+++ b/indra/llmath/llvolumemgr.cpp
@@ -89,7 +89,7 @@ BOOL LLVolumeMgr::cleanup()
 // Note however that LLVolumeLODGroup that contains the volume
 //  also holds a LLPointer so the volume will only go away after
 //  anything holding the volume and the LODGroup are destroyed
-LLVolume* LLVolumeMgr::refVolume(const LLVolumeParams &volume_params, const S32 detail)
+LLVolume* LLVolumeMgr::refVolume(const LLVolumeParams &volume_params, const S32 lod)
 {
 	LLVolumeLODGroup* volgroupp;
 	if (mDataMutex)
@@ -109,7 +109,7 @@ LLVolume* LLVolumeMgr::refVolume(const LLVolumeParams &volume_params, const S32
 	{
 		mDataMutex->unlock();
 	}
-	return volgroupp->refLOD(detail);
+	return volgroupp->refLOD(lod);
 }
 
 // virtual
@@ -287,18 +287,18 @@ bool LLVolumeLODGroup::cleanupRefs()
 	return res;
 }
 
-LLVolume* LLVolumeLODGroup::refLOD(const S32 detail)
+LLVolume* LLVolumeLODGroup::refLOD(const S32 lod)
 {
-	llassert(detail >=0 && detail < NUM_LODS);
-	mAccessCount[detail]++;
+	llassert(lod >=0 && lod < NUM_LODS);
+	mAccessCount[lod]++;
 	
 	mRefs++;
-	if (mVolumeLODs[detail].isNull())
+	if (mVolumeLODs[lod].isNull())
 	{
-		mVolumeLODs[detail] = new LLVolume(mVolumeParams, mDetailScales[detail]);
+		mVolumeLODs[lod] = new LLVolume(mVolumeParams, mDetailScales[lod]);
 	}
-	mLODRefs[detail]++;
-	return mVolumeLODs[detail];
+	mLODRefs[lod]++;
+	return mVolumeLODs[lod];
 }
 
 BOOL LLVolumeLODGroup::derefLOD(LLVolume *volumep)