2 replies to this topic

[goshone]

Sorry if this has been discussed but I only found a similar post on sidefx forums:

http://www.sidefx.co...p=112168#112168

Basically, there is this frustrating artifact (which admittedly can be somewhat removed as stated in the post) still, even with Houdini 11.1. It was said to be fixed in later builds, but with a very basic scene (attached) it is very apparent.  I find it a bit embarrassing TBH, that mantra would fail on such a simple render.

As the above post explains, it can be minimized by setting the 'noise level' on the mantra ROP to 1 (default of 0.05!).  This can't be normal.  Seems to be an issue with triangles mainly.  Am I missing something?  

Attached Thumbnails

• 

Attached Files

•  jackedUp.hip   780.43K   33 downloads

[goshone]

From the build journal on sidefx.com

Quote

Tuesday, September 14, 2010
Houdini 11.0.504: Fixed a problem with micropolygon PBR rendering of triangles that would lead to artifacts along triangle edges.


Monday, August 16, 2010
Houdini 11.0.475: Fixed a problem that would produce artifacts when shading triangles with micropolygon rendering using the Surface Model VOP.

Also it seems to go away when completely disabling 'Ray Variance Antialiasing'.  Not sure what kind of effect doing that would have on a regular to complex scene, this is a dead simple scene after all.

Seems to go away when switching to PBR rendering.

By the way, this problem arose by simply trying to test and build materials on a sphere over a background plate.

[goshone]

Seems to have been fixed in H12.