VRay Volumetric Fog

[joelly3d]

I have an object being used as a volumetric fog gizmo and I cannot get the fog color or density to be mapped to a gradient. Expected behavior would be that it would inherit the texture from the source object. I realize this may not be the case because fog has no UV's and would need a procedural texture. Even when using something like a vraydistancetex or a falloff on object mode like the doc here states http://docs.chaosgroup.com/display/V...nvironmentFog#... it doesn't seem to work. I want to be able to fade out the fog with a gradient ultimately, but I can't control the location of a world XYZ gradient predictably. I figured an gizmo based fader makes the most sense, but it is not working. Any suggestions?

max 2015 3.10.03

[davision]

Maybe you should post a sample scene?

I just tried using DistanceTex to control the fog color and it worked fine. See screenshot attached. The DistanceTex is keying off the red sphere.

Using the DistanceTex with black/white colors in density also works.

[vlado]

The distance texture might be a bit of an overkill for that purpose, a Falloff map in distance blend mode could be faster.

Best regards,
Vlado

[joelly3d]

Found my issue. It was a Cylider Gizmo, it doesn't seem to work with that for some reason.

[vlado]

Can you post a scene like this, just to check what may be wrong?

Best regards,
Vlado