Corona FOG/Volumetric material - EXCLUDE/INCLUDE

[Romas Noreika]

I have a question:

By any chance there is a way to exclude or include a specific light in volumetric/fog mtl?

For example: I have a scene with 5 lights. 1 SUN and 4 Artificial lights. I only want that the fog/volumetric mtl would work with SUN ONLY. Fog mtl will not take 4 artificial lights in to consideration.

If it did not made sense let me know :)

If it did please let me know if it is possible.?

Thank you,

Best,

Romas Noreika

[TomG]

Hi! Not possible, since everything is based on the real world, where if a light is shining through something with fog in it, then it will show up in that volume (in other words, Corona volumetrics are based on the media the light passes through, and are not an attribute of the light, just like in the real world).

You can of course artistically work around that by doing things such as
- Rendering twice, with the different lights enabled, and compositing in post
- Creating the media so that it is not affected by some lights (e.g. create a geometric cone or box which only certain lights will shine through)

[Romas Noreika]

Thank you TomG. I knew about those two other option, but I thought there might be another way.

But thanks for the answer and you time.

Best,

Romas Noreika