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View Full Version : Instancing question: backside of double sided polys rendering as black



jeric_synergy
10-01-2014, 07:30 PM
Using Instancing, the back side of a mesh with a double-sided surface is rendering as black-- see JPG:

124627

Is this a known issue? This is true of at least 2 double sided Surfaces in this scene, it holds for both.

Lewis
10-02-2014, 01:11 AM
N-gons ?

jeric_synergy
10-02-2014, 01:45 AM
The front renders ok. They ARE n-gons though.

Lewis
10-02-2014, 01:52 AM
The front renders ok. They ARE n-gons though.

Triangulate them ant then test. LW although supporting N-gons it's very very sensitive to them and it can cause many problems in various areas and especially rendering.

Also VPR and F9/F10 have different triangulation algorithm (LW triangulates all at render time anyway) so in some cases it works fine in VPR and no t in Render while in some cases it's other way around.