Vray Diffuse Trasparency & SU Material Opacity Conflict

[kohishop]

When I applied "Gray_Wall_Vertical" vismat from the Chaos website to my existing material, the related surface becames transparent; however, the rendering came out just fine.
It appears to be the Vray Diffuse Transparency setting and SU material Opacity setting is contradicting to each other since changing the opacity level in SU interface makes the diffuse layer transparent, and vice versa. Is it a glitch in vray or something that I just have to get used to?

[fpedrogo]

Yes, To avoid that behavior, which is normal in Sketchup, you have to set the transparency color of the diffuse layer to black and then click on the "m" near transparency color and use an "Acolor" mapping and use white, or your desired transparency color.
I made the material in Rhino and we don't have to use this approach, but when I use Sketchup instead of use the outside transparency color, I use AColor as a mapping to avoid the transparency of the surface in the viewport.

[kohishop]

Thanks for your help; I got it working!

[kohishop]

I have a followup question on the same "Gray_Wall_Vertical" Vismat. Your advice resolved transparency issue (thanks again for that) but the rendering come out really light as if it is overexposed; I had to make the diffuse color nearly black to match with the preview in the material editor. Is this another discrepancy between Rhino & Sketchup? Please let me know if I am doing anything wrong or right-_-;