>The result is an FBO without multisampling whose buffers are filled by >combining the multiple samples from the multisample FBO together.
Ok so the FBO multisampling is supported but not directly as it said on http://www.opengl.org/wiki/GL_EXT_framebuffer_object_More_about_FBOs "Are multisample Render_To_Texture (RTT) supported? Not directly. You need GL_EXT_framebuffer_multisample and you would have to copy the contents of the AA-FBO to a standard RTT." >> you have to use glBlitFramebuffer to >> copy the multisample FBO to a FBO without multisampling to resolve the >> samples to a texture; this is what osgUtil::RenderStage does when you >> attach an osg::Texture and set the samples to > 1. I looked at the code in the osgUtil::RenderStage::DrawInner method but it seems to depend on a call of the osgUtil::RenderStage::setMultisampleResolveFramebufferObject(osg::FrameBufferObject* fbo) that seems to be never called. Does it means that I have to call it by myself? Maybe I could perform the blit by myselft instead of calling this method? I saw an old post about that (see the post named Setting the resolve FBO for multisampled RTT on 8/27/08) but it was not clear what to do. Thanks Jonathan
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