Ashikhmin-Shirley distribution of glossy shader at 0 roughness causes artifacts when background uses MIS #44113
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Reference: blender/blender#44113
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System Information
Win7 64bit, Quadro 4000
Blender Version
Broken: 2.73a, 2.74 RC2, both win x64
Short description of error
Ashikhmin-Shirley distribution of glossy shader at 0 roughness causes artifacts when background uses MIS. The artifacts look different depending on the device used (CPU or GPU) and depending on the kind of render (viewport or real render using F12).
Render GPU: http://www.pasteall.org/pic/85747
Render CPU: http://www.pasteall.org/pic/85748
Viewport GPU: http://www.pasteall.org/pic/85745
Viewport CPU: http://www.pasteall.org/pic/85746
Note: I know that for roughness 0 a glossy shader should be set to sharp and that MIS is bad when the background has just simple gradients, but setups like this happen sometimes...
Exact steps for others to reproduce the error
Changed status to: 'Open'
Added subscriber: @GottfriedHofmann
Added subscriber: @mont29
Sergey, think that one is for you. ;)
This issue was referenced by
af399884e1
Changed status from 'Open' to: 'Resolved'
Closed by commit
af399884e1
.This issue was referenced by blender/cycles@f02545b309
This issue was referenced by
114d1b23d2