Rendering issue with using sample as lamp in world settings #31987
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Reference: blender/blender#31987
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%%%I have discovered an issue which only occurs when using multi gpu rendering selected when using the sample as lamp option in the world settings using a background environment map. If only one video card is selected to use for the rendering device everything works fine.
I have included a simple blend file which on my system works if using 128 samples but if I increase them to 256 the sphere is reflecting just black. (renders fine with much higher values when using 1 gpu)
To reproduce the problem just increase the samples on the sample as lamp.
I am using 2 x GTX 570 1280Mb
I have tried 32bit and 64bit Windows 7 both have the same result.
%%%
Changed status to: 'Open'
%%%Brecht, could you please check on this?%%%
%%%Get the same result with 2 x gtx 570 2.5GB cards as well.%%%
%%%Can you please re-test with RC1? http://download.blender.org/release/Blender2.64/%%%
%%%Still the same issue. Strangely if I reduce the value to 255 it sometimes renders correctly, and sometimes renders properly when returning it back to 256. Is it some sort of sync issue when using multi gpu?%%%
%%%Fix in svn, thanks for the report.%%%
Changed status from 'Open' to: 'Resolved'