VRay Light Select render element + GI?

[RockinAkin]

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!

[Zdravko]

The light select render element only preserve the direct light information of the light.
For the GI you should use Global Illumination render element.

[Dariusz Makowski (Dadal)]

Is there any ETA to get Global Illumination render element per light maybe ?

[RockinAkin]

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.

[jasonhuang1115]

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....

[Morbid Angel]

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.

[RockinAkin]

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.

[Dariusz Makowski (Dadal)]

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

[RockinAkin]

Very cool Dadal... Is that script available online anywhere?

[Dariusz Makowski (Dadal)]

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.