[murphyspublic]

Hello everyone! Quick question:
I've got these little black squares showing up on my surfaces with occlusion (see image for example).



Off the top of your head, any idea what knobs I can tweak to get rid of those?
They change randomly per frame it seems. So it's not a geo problem.
Thanks!
Running:

RMS 3.0.0
RMfM Pro 4.0.0
on
Red Had Linux 5.

Thanks!
Murphy

[Sunstar]

Hi Murhpy,

Is been a very long time since I last use renderman, but I remember having those problems, don't remember how I fixed them

Don't remember if it appear because it was so close to the geometry behind, try hiding the geometry behind or modify it so it won't be near. I remember that when using planar/flat geometry with the IBI shader I used to have some problems and I always need it to make it a little curved, but this is not related to yours.

Are you using NURBs or Polygons?

[murphyspublic]

Hi Sunstar!
Thanks for your reply. That's a good idea, I hadn't even thought of double geometry. I'm checking that out now.
I'm using polygons.
Will keep you updated...

[eddgarpv]

That happens with some face normals pointing in the wrong way but it could be also what Sunstar says (in that case, tweaking bias or hitsides in your shader can help).

[murphyspublic]

Ok, great eddgarpv!
I'll check my render this morning when I get back in. I tried adding a subdiv scheme to those objects, remembering that maybe that might be what's going on, and that seemed to fix it. Now I have to worry about reproducing the look and feel of the original geo, even with the subsurface added.

[murphyspublic]

Oka,y so applying a subdiv scheme seemed to solve it. Now, like I said, I just have to figure out how to preserve visual style.

Thanks!
M