6 files changed, 26 insertions, 23 deletions
diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index 992618ba11..c11f3cf978 100644
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -9112,28 +9112,19 @@
     <key>Value</key>
     <integer>0</integer>
   </map>
-    <key>RenderUseShaderLOD</key>
-    <map>
-      <key>Comment</key>
-      <string>Whether we want to have different shaders for LOD</string>
-      <key>Persist</key>
-      <integer>1</integer>
-      <key>Type</key>
-      <string>Boolean</string>
-      <key>Value</key>
-      <integer>1</integer>
-    </map>
-    <key>RenderUseShaderNearParticles</key>
-    <map>
-      <key>Comment</key>
-      <string>Whether we want to use shaders on near particles</string>
-      <key>Persist</key>
-      <integer>1</integer>
-      <key>Type</key>
-      <string>Boolean</string>
-      <key>Value</key>
-      <integer>0</integer>
-    </map>
+    
+  <key>RenderAutoHideSurfaceAreaLimit</key>
+  <map>
+    <key>Comment</key>
+    <string>Maximum surface area of a set of proximal objects inworld before automatically hiding geometry to prevent system overload.</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>F32</string>
+    <key>Value</key>
+    <integer>0</integer>
+  </map>
+
     <key>RenderVBOEnable</key>
     <map>
       <key>Comment</key>
diff --git a/indra/newview/llspatialpartition.cpp b/indra/newview/llspatialpartition.cpp
index 5d196a465f..38c7dd8283 100644
--- a/indra/newview/llspatialpartition.cpp
+++ b/indra/newview/llspatialpartition.cpp
@@ -1186,6 +1186,7 @@ void LLSpatialGroup::clearOcclusionState(U32 state, S32 mode)
 //======================================
 
 LLSpatialGroup::LLSpatialGroup(OctreeNode* node, LLSpatialPartition* part) :
+	mObjectBoxSize(1.f),
 	mState(0),
 	mGeometryBytes(0),
 	mSurfaceArea(0.f),
diff --git a/indra/newview/llspatialpartition.h b/indra/newview/llspatialpartition.h
index 6c14ecf452..1a93145cc5 100644
--- a/indra/newview/llspatialpartition.h
+++ b/indra/newview/llspatialpartition.h
@@ -378,6 +378,8 @@ public:
 	LLVector4a mObjectBounds[2]; // bounding box (center, size) of objects in this node
 	LLVector4a mViewAngle;
 	LLVector4a mLastUpdateViewAngle;
+
+	F32 mObjectBoxSize; //cached mObjectBounds[1].getLength3()
 		
 private:
 	U32                     mCurUpdatingTime ;
diff --git a/indra/newview/llvovolume.cpp b/indra/newview/llvovolume.cpp
index e7c35d8220..080d1f774a 100644
--- a/indra/newview/llvovolume.cpp
+++ b/indra/newview/llvovolume.cpp
@@ -4123,6 +4123,9 @@ void LLVolumeGeometryManager::rebuildGeom(LLSpatialGroup* group)
 	group->mGeometryBytes = 0;
 	group->mSurfaceArea = 0;
 	
+	//cache object box size since it might be used for determining visibility
+	group->mObjectBoxSize = group->mObjectBounds[1].getLength3().getF32();
+
 	group->clearDrawMap();
 
 	mFaceList.clear();
diff --git a/indra/newview/pipeline.cpp b/indra/newview/pipeline.cpp
index fbaded04b0..de7296b2dc 100644
--- a/indra/newview/pipeline.cpp
+++ b/indra/newview/pipeline.cpp
@@ -187,6 +187,7 @@ F32 LLPipeline::RenderShadowFOVCutoff;
 BOOL LLPipeline::CameraOffset;
 F32 LLPipeline::CameraMaxCoF;
 F32 LLPipeline::CameraDoFResScale;
+F32 LLPipeline::RenderAutoHideSurfaceAreaLimit;
 
 const F32 BACKLIGHT_DAY_MAGNITUDE_AVATAR = 0.2f;
 const F32 BACKLIGHT_NIGHT_MAGNITUDE_AVATAR = 0.1f;
@@ -592,6 +593,7 @@ void LLPipeline::init()
 	gSavedSettings.getControl("CameraOffset")->getCommitSignal()->connect(boost::bind(&LLPipeline::refreshCachedSettings));
 	gSavedSettings.getControl("CameraMaxCoF")->getCommitSignal()->connect(boost::bind(&LLPipeline::refreshCachedSettings));
 	gSavedSettings.getControl("CameraDoFResScale")->getCommitSignal()->connect(boost::bind(&LLPipeline::refreshCachedSettings));
+	gSavedSettings.getControl("RenderAutoHideSurfaceAreaLimit")->getCommitSignal()->connect(boost::bind(&LLPipeline::refreshCachedSettings));
 }
 
 LLPipeline::~LLPipeline()
@@ -1015,6 +1017,7 @@ void LLPipeline::refreshCachedSettings()
 	CameraOffset = gSavedSettings.getBOOL("CameraOffset");
 	CameraMaxCoF = gSavedSettings.getF32("CameraMaxCoF");
 	CameraDoFResScale = gSavedSettings.getF32("CameraDoFResScale");
+	RenderAutoHideSurfaceAreaLimit = gSavedSettings.getF32("RenderAutoHideSurfaceAreaLimit");
 	
 	updateRenderDeferred();
 }
@@ -3341,7 +3344,9 @@ void LLPipeline::postSort(LLCamera& camera)
 	{
 		LLSpatialGroup* group = *i;
 		if (sUseOcclusion && 
-			group->isOcclusionState(LLSpatialGroup::OCCLUDED))
+			group->isOcclusionState(LLSpatialGroup::OCCLUDED) ||
+			(RenderAutoHideSurfaceAreaLimit > 0.f && 
+			group->mSurfaceArea > RenderAutoHideSurfaceAreaLimit*llmax(group->mObjectBoxSize, 10.f)))
 		{
 			continue;
 		}
diff --git a/indra/newview/pipeline.h b/indra/newview/pipeline.h
index 3c4e389ce0..252fe1346c 100644
--- a/indra/newview/pipeline.h
+++ b/indra/newview/pipeline.h
@@ -849,6 +849,7 @@ public:
 	static BOOL CameraOffset;
 	static F32 CameraMaxCoF;
 	static F32 CameraDoFResScale;
+	static F32 RenderAutoHideSurfaceAreaLimit;
 };
 
 void render_bbox(const LLVector3 &min, const LLVector3 &max);