Hey there,
For a while now I’ve wanted to take advantage of the VRay Light Select render element to control my lighting in post.
Unfortunately I cant seem to find a way to get it to include the light’s GI contribution.
Attached is a pic showing what I mean.
I read that the Bi-Directional Path Tracer was supposed to be able to make this work, but I’m not sure how to do that.
Any help is much appreciated!
The light select render element only preserve the direct light information of the light.
For the GI you should use Global Illumination render element.
Is there any ETA to get Global Illumination render element per light maybe ?
Correct me if I’m wrong, but doesnt the GI render element only give me the overall GI of the scene? I’m looking for individual control per light.
You are right. Search around in the forum and you will find several threads discussing this and the current implementation of Light Select RE doesn’t include the GI effect on a per-light basis. Vlado mentioned that it will be available at some point with the BDPT…
its difficult to implement this, when gi gets mixed and interpolated, no way to tell which ray came from where, hence the bpt solution. If sometimes I need the control for gi, I just render lights as RGB color, and then the gi contribution gets colored as well, its not ideal but it gets you what you want for now.
Ah, that’s a clever workaround for a simple lighting setup Morbid Angel. Thanks for that tip.
Looking forward to seeing more from the BDPT.
Or you can just use maya render layers and create layer per light. I wrote a script a while back that did just that. Then all you need is direct and indirect layer from render passes for shot like that. It was pure diffuse/gi
Very cool Dadal… Is that script available online anywhere?
Heya
Nope, it was for MR, but I’m working on V version. Just no time on my hands yet 
Will get post a quick copy once I have at least 30 min of spare time :s
Thanks ,bye.
