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
As they appear after: