[Bf-committers] [Bf-blender-cvs] SVN commit: /data/svn/bf-blender [56478] trunk/blender/intern/cycles/kernel /closure/bsdf_microfacet.h: Fix #35160: cycles was rendering glossy BSDF' s with zero roughness too rough

[Brecht Van Lommel]

Thanks for pointing this out, fixed now. There's still a difference
for the red sphere in the lower right corner, but this is a bugfix.
The results should render the same color with roughness 0 and 0.001
but it didn't before.

Brecht.

On Fri, May 3, 2013 at 10:41 AM, Thomas Dinges <blender at dingto.org> wrote:
> Hi Brecht,
> after this commit, color_ramp.blend (from the regression tests) renders
> quite differently.
>
> 5 of the 6 spheres in that scene have a roughness of 0.0. (Glossy or
> Glass shader)
>
> 2.67 RC: http://www.pasteall.org/pic/50540
> Trunk: http://www.pasteall.org/pic/50541
>
> Best regards,
> Thomas
>
> Am 03.05.2013 00:05, schrieb Brecht Van Lommel:
>> Revision: 56478
>>            http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-blender&revision=56478
>> Author:   blendix
>> Date:     2013-05-02 22:05:57 +0000 (Thu, 02 May 2013)
>> Log Message:
>> -----------
>> Fix #35160: cycles was rendering glossy BSDF's with zero roughness too rough
>> after a bugfix for precision issues with low roughness. Now it renders them as
>> perfectly sharp which avoids the problematic calculations rather than increasing
>> the roughness.
>
> --
> Thomas Dinges
> Blender Developer, Artist and Musician
>
> www.dingto.org
>
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