4 files changed, 12 insertions, 10 deletions
diff --git a/indra/llrender/llgl.cpp b/indra/llrender/llgl.cpp
index 20ca189e7f..946e602fee 100644
--- a/indra/llrender/llgl.cpp
+++ b/indra/llrender/llgl.cpp
@@ -835,14 +835,6 @@ std::string LLGLManager::getRawGLString()
 	return gl_string;
 }
 
-U32 LLGLManager::getNumFBOFSAASamples(U32 samples)
-{
-	samples = llmin(samples, (U32) mMaxColorTextureSamples);
-	samples = llmin(samples, (U32) mMaxDepthTextureSamples);
-	samples = llmin(samples, (U32) 4);
-	return samples;
-}
-
 void LLGLManager::shutdownGL()
 {
 	if (mInited)
diff --git a/indra/llrender/llgl.h b/indra/llrender/llgl.h
index dee7ec0739..6a147b8e19 100644
--- a/indra/llrender/llgl.h
+++ b/indra/llrender/llgl.h
@@ -150,7 +150,6 @@ public:
 	void printGLInfoString();
 	void getGLInfo(LLSD& info);
 
-	U32 getNumFBOFSAASamples(U32 desired_samples = 32);
 	// In ALL CAPS
 	std::string mGLVendor;
 	std::string mGLVendorShort;
diff --git a/indra/llrender/llimagegl.cpp b/indra/llrender/llimagegl.cpp
index 789402c4a9..78591ddd38 100644
--- a/indra/llrender/llimagegl.cpp
+++ b/indra/llrender/llimagegl.cpp
@@ -1838,7 +1838,7 @@ void LLImageGL::analyzeAlpha(const void* data_in, U32 w, U32 h)
 	// this to be an intentional effect and don't treat as a mask.
 
 	U32 midrangetotal = 0;
-	for (U32 i = 4; i < 11; i++)
+	for (U32 i = 2; i < 13; i++)
 	{
 		midrangetotal += sample[i];
 	}
diff --git a/indra/llrender/llrender.cpp b/indra/llrender/llrender.cpp
index 97aeae548a..812fa7024b 100644
--- a/indra/llrender/llrender.cpp
+++ b/indra/llrender/llrender.cpp
@@ -1887,6 +1887,17 @@ void LLRender::flush()
 void LLRender::vertex3f(const GLfloat& x, const GLfloat& y, const GLfloat& z)
 { 
 	//the range of mVerticesp, mColorsp and mTexcoordsp is [0, 4095]
+	if (mCount > 2048)
+	{ //break when buffer gets reasonably full to keep GL command buffers happy and avoid overflow below
+		switch (mMode)
+		{
+			case LLRender::POINTS: flush(); break;
+			case LLRender::TRIANGLES: if (mCount%3==0) flush(); break;
+			case LLRender::QUADS: if(mCount%4 == 0) flush(); break; 
+			case LLRender::LINES: if (mCount%2 == 0) flush(); break;
+		}
+	}
+			
 	if (mCount > 4094)
 	{
 	//	llwarns << "GL immediate mode overflow.  Some geometry not drawn." << llendl;