1 files changed, 30 insertions, 1 deletions

diff --git a/indra/newview/llvovolume.cpp b/indra/newview/llvovolume.cpp
index 149b60ca53..43bb1c177c 100644
--- a/indra/newview/llvovolume.cpp
+++ b/indra/newview/llvovolume.cpp
@@ -250,10 +250,12 @@ LLVOVolume::~LLVOVolume()
     delete mVolumeImpl;
     mVolumeImpl = NULL;
 
-    gMeshRepo.unregisterMesh(this);
+    unregisterOldMeshAndSkin();
 
     if(!mMediaImplList.empty())
     {
+        LL_PROFILE_ZONE_NAMED_CATEGORY_MEDIA("delete volume media list");
+
         for(U32 i = 0 ; i < mMediaImplList.size() ; i++)
         {
             if(mMediaImplList[i].notNull())
@@ -998,6 +1000,28 @@ LLDrawable *LLVOVolume::createDrawable(LLPipeline *pipeline)
     return mDrawable;
 }
 
+// Inverse of gMeshRepo.loadMesh and gMeshRepo.getSkinInfo, combined into one function
+// Assume a Collada mesh never changes after being set.
+void LLVOVolume::unregisterOldMeshAndSkin()
+{
+    if (mVolumep)
+    {
+        const LLVolumeParams& params = mVolumep->getParams();
+        if ((params.getSculptType() & LL_SCULPT_TYPE_MASK) == LL_SCULPT_TYPE_MESH)
+        {
+            // object is being deleted, so it will no longer need to request
+            // meshes.
+            for (S32 lod = 0; lod != LLVolumeLODGroup::NUM_LODS; ++lod)
+            {
+                gMeshRepo.unregisterMesh(this, params, lod);
+            }
+            // This volume may or may not have a skin
+            gMeshRepo.unregisterSkinInfo(params.getSculptID(), this);
+        }
+    }
+}
+
+
 bool LLVOVolume::setVolume(const LLVolumeParams &params_in, const S32 detail, bool unique_volume)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_VOLUME;
@@ -1511,11 +1535,16 @@ bool LLVOVolume::calcLOD()
 
     mLODAdjustedDistance = distance;
 
+    static LLCachedControl<S32> debug_selection_lods(gSavedSettings, "DebugSelectionLODs", 0);
     if (isHUDAttachment())
     {
         // HUDs always show at highest detail
         cur_detail = 3;
     }
+    else if (isSelected() && debug_selection_lods() >= 0)
+    {
+        cur_detail = llmin(debug_selection_lods(), 3);
+    }
     else
     {
         cur_detail = computeLODDetail(ll_round(distance, 0.01f), ll_round(radius, 0.01f), lod_factor);