Notice how the transparency on the case on the top of the right podium is sharp edged. The png that’s driving the texture fades from opaque to transparent but V-Ray doesn’t show that fading. Is there a way to make it do that?
Thanks for any advice you’ve got
Hi arail,
It would be best if you could share the file with us so we can take a look at how the texture and material are setup. If this is alright, please send us an archived copy (V-Ray > Export > Pack Project) directly at support@chaosgroup.com or through a file-sharing service of your choice.
Simply check the [Use color texture as transparency] box in the Diffuse layer of your material.
Doesn’t work with VRayBRDF. So when creating a generic material get rid of the BRDF layer first and then add a Diffuse layer 
Just a heads-up, this workflow will be obsolete in the upcoming V-Ray 3.6 for Rhino build.
Improvements to opacity controls (already implemented in V-Ray 3.6 for SketchUp) are described in Chaos Docs
Kind regards,
Peter
I can’t find the option “only in secondary” at the help page. I use it at VfR2 very often. Will it be available for the next VfR release?
Ah, even better 
Thank you Peter for the info!
Hi Micha,
long time no see
What do you use the option for? Creating reflections?
Coming from the good old days of then-Discreet 3dsmax 5’s scanline renderer, I was still employing this technique for quite some time in V-Ray, as well. However, I adopted a photographic approach and stick to realism, nowadays. I believe that’s also what the developers have in mind when stripping not-so-realistic options.
When there is a need to isolate objects for presentations, I’d rather rely on masking them through the Render ID channel.
Best,
Matthias
Great, thank you. Since there is no Rhino 6 version yet, I can’t quick check or test something. I hope Rhino 6 will be released soon. Or Chaosgroup will be so kind a release a R6 version too. (Come on guys, other render plugin teams do it too. 
)
We’re closely following the Rhino 6 development process. Current plan is to add support once it is commercially released.
Kind regards,
Peter