I removed the point size in the shader and it didn't make it any faster that I could tell.. It was still jerky. Commenting out the section you mentioned (which is in there twice) would seem to defeat the entire sketch, as that is what renders the 60,000 textures. Otherwise, you're just rending a skybox. I still don't see how it would be a GPU bottleneck if it works perfectly fine in 1.5 using the exact same shader and opengl code.
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