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Partially Transparent Texture Interplay

Posted: Thu Apr 05, 2018 6:51 pm
by PWatanabe
I'm having a problem with the behavior of slightly partially transparent materials.

I essentially have two different 0-thickness objects. Object A has a partially transparent texture (95% opacity) applied to both its front and back faces. Object B has a different partially transparent texture (97%) applied to both its front and back faces as well.

When Object B is in front of Object A in a render, it becomes almost fully transparent, with Object A's texture showing through strongly and Object B's only very weakly, when I would expect the reverse to be true.

Textures as they appear before rendering in LightUp
prerender.jpg (439.97 KiB) Viewed 11992 times
As they appear after:
IZAKAYA_MAKKU_v4_(elevation_adjusted)_lightup(Scene 1)_2018-04-05_1152.jpg
IZAKAYA_MAKKU_v4_(elevation_adjusted)_lightup(Scene 1)_2018-04-05_1152.jpg (144.77 KiB) Viewed 11992 times

Re: Partially Transparent Texture Interplay

Posted: Fri Apr 06, 2018 3:16 pm
by skywlkrsnd
Have you tried adding some thickness to geometry for both A and B? Sometimes material transparency and light don't work very well together when you have 0-thickness objects. (generally in most renderers in my experience, not just LightUp)