pyro : export variable for each light

[MrGAG]

Hello everyone,

I have a simple volume object, with a pyro shader applied to it. I then add to simple lights with shadow map.

Everything renders fine. But now I would like to to export each light influence separatly.

When I create extra image planes to do that, I can't get what I need :

I have tried : direct_diffuse, direct_volume, smoke_color, and a bunch of other variables .... and still nothing.

Is there a way to get extra image planes with separate light infuence ?

I hope I'am clear

[lukeiamyourfather]

I think those preset variables for the extra image planes only work with PBR. Also change the "Light Exports" parameter on the image plane options to "Export variable for each light" if you want the individual lights on their on image planes.

[old school]

In order to do per light exports, you need to put the export parameters inside the illuminance loop for micropolygon and raytracing. For PBR, it's more of a challenge.

Currently none of the volumetric shaders (pyro, billowy, basic smoke) ship with per-light exports. Only the Pyro Shader ships with any exports at all.

Have you tried rendering out your lights one with pure red, one with green and one with blue? The R, G and B channels each would then represent each light in comp. If you have a look at the DD breakdown reels from the past wrt volumetrics, you will see three lights, R G and B in the pass so that each can be separated in comp and then adjusted.

[MrGAG]

thank you old school. It's clearer now why I couldn't get those extra planes.

Regarding the "RGB" solution, I will definitely try this, it could be a very elegant plan B. Thank you for that