@panixia said: @bocomofo said: have you checked the use 'colour texture as transparency' in the diffuse rollout. he did it for sure, elsewhere transparency would have not worked in the diffuse I would rather check if the material was properly applied to the backface, cause that can lead some problem. i suggest check if the material is applied on the front face (turn on monocrhome mode and check) and then use "frontface material to backface" from thomthom's UV Toolkit That sounds like the right answer. I did some quick tests - and if you have a different material on the backface, the shadow will be a half-tone of the transparency of the front and the opacity of the back.