Modo ambient light is ignored

[1funk]

Modo has ambient light under render > global illumination > ambient intensity

Would it be possible to get this working in Vray? I see mentions of a VRayAmbientLight in the docs, but I'm not sure if this could be mapped to modo's ambient light.

[vladimir.nedev]

It should be doable, we have an ambient light implementation we did for Maya.

Greetings,
Vladimir Nedev

[1funk]

Thanks Vladimir. I have never used VRay before so I dont know what VRayAmbientLight looks like, or if it matches the look of modo ambient light.

eg. I might use modo ambient light sometimes to create a flat colored render without GI and other lights (eg. disable GI and lights and set ambient intensity to 1). I think this look would be the same as enabling self illumination (without affect GI) in every vray material. I guess it would also match VRayDiffuseFilter / "Modo Diffuse coefficient" render passes.

Does Vray ambient light work this way?

[vladimir.nedev]

I think it does.

Greetings,
Vladimir Nedev

[vladimir.nedev]

So this should be fixed in the 2014.12.12 nightly build. It will be part of the next Open Beta build as well.

It works a bit differently in V-Ray though, when GI is enabled.
In MODO it seems the ambient intensity/color affects only the last GI bounce. So as you increase the GI bounces, the ambient contribution actually becomes smaller and smaller.
In V-Ray all GI bounces are affected. So as you increase the GI bounces, the overall ambient contribution increases as well. It will be kind of hard to make it work as in
MODO with all combinations of GI engines, so I will leave it as it is for now. If you are using it with GI in V-Ray, you will probably need to enter a lower value than the one you use
with MODO's renderer.

Greetings,
Vladimir Nedev