![]() Writing fragments to nonzero attachments is 2-3 times slower than expected. In all tests I compared AMD performance with the same AMD GPU, but writing to unaffected GL_COLOR_ATTACHMENT0, and with Nvidia hardware whose performance difference to my AMD device is well known. After some investigation the slow code boiled down to creating FBO with several attachments and writing to any nonzero attachment. ![]() I noticed that my 3D engine runs very slow on AMD hardware.
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