I am running into a GI anolmoly and wondering if someone has a suggestion to fix it. I have a tree which renders fine w/o GI and with GI and no bounces. When I add a bounce, “holes” appear in the geometry. I tried exporting different tesselations, and triangulated the geometry, but the hole still appeared.
GI (no bounce): http://homepage.mac.com/bergcj/whimsical_tree.jpg
GI (1 bounce): http://homepage.mac.com/bergcj/whimsical_tree_BAD.jpg
(enhanced to show holes)
Thank you for looking,
Cj
Hello:
I had a look and got the same result, then I did a polygon outline, and it looks like some bad polygons, then I added a Dicer! object set with triangulate and it renders fine now.
k!
Hey Cj. If this was modeled in FormZ, you should definitely try using the Triangulate Tool and set it to “triangulate non-planar faces only” in the tool options. Then you would get minimal added geometry. This of course assumes you are modeling in facetted mode. If you are modeling in smooth mode, then you can first convert the smooth model to facetted.
Hi, Charles
Looks like you are a victim of unlucky boolean - you’ve double-sided surface fragments, raytracers don’t process them correctly. The attachment is the alpha channel, render with no GI, no lights, dissolve = 0.75 (clip tab)
Thank you Igors, looks like I need to remodel the whole thing, probably will avoid NURBS and use the old fashioned method. At least it is a simple shape
Cj
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