LightSelect and Reflections (maya)

[asayan]

Hey, all. Just wanted to know, does the lightSelect include reflections now? Current version we have at work only does diffuse+spec.

[vlado]

In the latest nightly builds, this works if you select the "All channels" value for the "Affect channels" attribute in the Reflection section of your materials. This will cause the materials to propagate render elements through reflections, which means that the light select will work properly in reflections.

Best regards,
Vlado

[asayan]

Hey, Vlado. Thanks for getting back to me. So I did do that, and it works great. But it also added reflections (or the reflection filter?--I can't tell in this render pass which it is) into the alpha. Is there any way to not have it affect the alpha channel?

Thanks!

[vlado]

Hey, Vlado. Thanks for getting back to me. So I did do that, and it works great. But it also added reflections (or the reflection filter?--I can't tell in this render pass which it is) into the alpha. Is there any way to not have it affect the alpha channel?

Unfortunately for the moment it's either all channels or nothing. We will have to think of some workaround I guess.

Best regards,
Vlado

[asayan]

Bummer. Okay...thanks, Vlado.

[asayan]

Just wanted to give you some feedback: It seems that the workaround you suggested increases rendertimes by more than 10X. This test that I'm basing the numbers off of was done by turning off the light select render elements, but keeping the shaders' option for reflections to all channels.

[vlado]

Interesting. Can you get me a scene so that I can check what's going on?

Best regards,
Vlado

[asayan]

The scene we're working with is pretty massive, so I can't do the entire thing. But I'll try and set up a test scene for you. In the meantime, some background info on the shot itself (if it'll help): It has about 25 vray rectangle lights, lots of shaders, and about 2 million faces.

Thanks.

[vlado]

Yep, it would be best to profile it here and see which part of the code takes so much time. Often, this brings up surprising results...

Best regards,
Vlado

[asayan]

Alrighty...I'll try and get a scene to you today, hopefully. Thanks, again!