diff --git a/include/osg/GLExtensions b/include/osg/GLExtensions
index 63e46538c..aa868e9cf 100644
--- a/include/osg/GLExtensions
+++ b/include/osg/GLExtensions
@@ -656,6 +656,9 @@ class OSG_EXPORT GLExtensions : public osg::Referenced
         // FrameBuferObject
         bool isFrameBufferObjectSupported;
         bool isPackedDepthStencilSupported;
+        bool isMultisampledRenderToTextureSupported;
+        bool isInvalidateFramebufferSupported;
+
         bool isRenderbufferMultisampleSupported() const { return glRenderbufferStorageMultisample != 0; }
         bool isRenderbufferMultisampleCoverageSupported() const { return glRenderbufferStorageMultisampleCoverageNV != 0; }
 
@@ -672,6 +675,7 @@ class OSG_EXPORT GLExtensions : public osg::Referenced
 
         void (GL_APIENTRY * glFramebufferTexture1D) (GLenum, GLenum, GLenum, GLuint, GLint);
         void (GL_APIENTRY * glFramebufferTexture2D) (GLenum, GLenum, GLenum, GLuint, GLint);
+        void (GL_APIENTRY * glFramebufferTexture2DMultisample) (GLenum, GLenum, GLenum, GLuint, GLint, GLsizei);
         void (GL_APIENTRY * glFramebufferTexture3D) (GLenum, GLenum, GLenum, GLuint, GLint, GLint);
         void (GL_APIENTRY * glFramebufferTexture) (GLenum, GLenum, GLint, GLint);
         void (GL_APIENTRY * glFramebufferTextureLayer) (GLenum, GLenum, GLuint, GLint, GLint);
@@ -680,6 +684,7 @@ class OSG_EXPORT GLExtensions : public osg::Referenced
 
         void (GL_APIENTRY * glGenerateMipmap) (GLenum);
         void (GL_APIENTRY * glBlitFramebuffer) (GLint, GLint, GLint, GLint, GLint, GLint, GLint, GLint, GLbitfield, GLenum);
+        void (GL_APIENTRY * glInvalidateFramebuffer) (GLenum, GLsizei, const GLenum*); // GL_ARB_invalidate_subdata or GL 4.3 or GLES 3
         void (GL_APIENTRY * glGetRenderbufferParameteriv) (GLenum, GLenum, GLint*);
 
         //ARB_framebuffer_no_attachments
diff --git a/src/osg/GLExtensions.cpp b/src/osg/GLExtensions.cpp
index c64c5995f..b7617bdd2 100644
--- a/src/osg/GLExtensions.cpp
+++ b/src/osg/GLExtensions.cpp
@@ -1077,6 +1077,9 @@ GLExtensions::GLExtensions(unsigned int in_contextID):
 
 
     // FrameBufferObject
+    isMultisampledRenderToTextureSupported = validContext && isGLExtensionSupported(contextID, "GL_EXT_multisampled_render_to_texture");
+    isInvalidateFramebufferSupported = validContext && (isGLExtensionSupported(contextID, "GL_ARB_invalidate_subdata") || (OSG_GLES3_FEATURES && glVersion >= 3.0) || glVersion >= 4.3);
+
     setGLExtensionFuncPtr(glBindRenderbuffer, "glBindRenderbuffer", "glBindRenderbufferEXT", "glBindRenderbufferOES", validContext);
     setGLExtensionFuncPtr(glDeleteRenderbuffers, "glDeleteRenderbuffers", "glDeleteRenderbuffersEXT", "glDeleteRenderbuffersOES", validContext);
     setGLExtensionFuncPtr(glGenRenderbuffers, "glGenRenderbuffers", "glGenRenderbuffersEXT", "glGenRenderbuffersOES", validContext);
@@ -1090,6 +1093,7 @@ GLExtensions::GLExtensions(unsigned int in_contextID):
 
     setGLExtensionFuncPtr(glFramebufferTexture1D, "glFramebufferTexture1D", "glFramebufferTexture1DEXT", "glFramebufferTexture1DOES", validContext);
     setGLExtensionFuncPtr(glFramebufferTexture2D, "glFramebufferTexture2D", "glFramebufferTexture2DEXT", "glFramebufferTexture2DOES", validContext);
+    setGLExtensionFuncPtr(glFramebufferTexture2DMultisample, "glFramebufferTexture2DMultisample", "glFramebufferTexture2DMultisampleEXT", validContext);
     setGLExtensionFuncPtr(glFramebufferTexture3D, "glFramebufferTexture3D", "glFramebufferTexture3DEXT", "glFramebufferTexture3DOES", validContext);
     setGLExtensionFuncPtr(glFramebufferTexture, "glFramebufferTexture", "glFramebufferTextureEXT", "glFramebufferTextureOES", validContext);
     setGLExtensionFuncPtr(glFramebufferTextureLayer, "glFramebufferTextureLayer", "glFramebufferTextureLayerEXT", "glFramebufferTextureLayerOES", validContext);
@@ -1105,6 +1109,7 @@ GLExtensions::GLExtensions(unsigned int in_contextID):
 
     setGLExtensionFuncPtr(glGenerateMipmap, "glGenerateMipmap", "glGenerateMipmapEXT", "glGenerateMipmapOES", validContext);
     setGLExtensionFuncPtr(glBlitFramebuffer, "glBlitFramebuffer", "glBlitFramebufferEXT", "glBlitFramebufferOES", validContext);
+    setGLExtensionFuncPtr(glInvalidateFramebuffer, "glInvalidateFramebuffer", "glInvalidateFramebufferEXT", validContext);
     setGLExtensionFuncPtr(glGetRenderbufferParameteriv, "glGetRenderbufferParameteriv", "glGetRenderbufferParameterivEXT", "glGetRenderbufferParameterivOES", validContext);