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Description of problem: The teapot in "fbotexture", and the teapot shadow in "teapot", show rendering differences with, and without back face culling. This happens using hardware acceleration (on PALM-type hardware, AMD E-350) and with llvmpipe (LIBGL_ALWAYS_SOFTWARE=1). Version-Release number of selected component (if applicable): kernel-2.6.38.6-27.fc15.x86_64 mesa-libGL-7.11-0.11.20110525.0.fc15.x86_64 mesa-dri-drivers-7.11-0.11.20110525.0.fc15.x86_64 mesa-dri-llvmcore-7.11-0.11.20110525.0.fc15.x86_64 xorg-x11-drv-ati-6.14.1-2.20110525gitfe5c42f51.fc15.x86_64 mesa-demos-7.10-4.20101028.fc15.x86_64 How reproducible: Always Steps to Reproduce: 1. Launch either fbotexture or teapot (in mesa-demos) 2. Toggle back face culling Actual results: Look at the limit between the teapot and the cover, it becomes transparent (probably with culling) or is solid (probably without culling). Expected results: No rendering difference. Additional info: Screenshots coming.
Created attachment 502220 [details] teapot (without culling ?)
Created attachment 502221 [details] teapot (with culling ?)
Created attachment 502222 [details] fbotexture (without culling ?)
Created attachment 502223 [details] fbotexture (with culling ?)
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