Volumetric Light from area or sun and sky

[Mnoloconic]

Hi guys,

How can I add volume to a light source in vray for modo? An example is if I shine a light through a gap in a box, I would like to see the light scatter. Not just see where the light hits a surface, but to see the light casting through within the darkness of the box and to see any obstructions cast a shadow due to the density of the light. I hope that makes sense.

Thank you for any guidance.
Gregg

[vladimir.nedev]

You need to add a V-Ray Environment Fog or a V-Ray Aerial Perspective to your scene. For your case, it's probably better to use V-Ray Environment Fog.
You can find both in the Item List under Add Item -> V-Ray Atmospheres.

Greetings,
Vladimir Nedev

[Mnoloconic]

mm, I did add them both to try but i just couldn't physically see the light, only the effect it had when hitting the surfaces.

[vladimir.nedev]

Then you probably need to make the fog more dense (i.e. lower the fog distance in the V-Ray Environment Fog) and make the light more bright.

Greetings,
Vladimir Nedev

[vladimir.nedev]

Also by default the V-Ray Environment Fog has a height of 1m, which might not be enough in your case.
You can turn off the height and select a gizmo instead.

Greetings,
Vladimir Nedev

[Mnoloconic]

i turned the light right up but still no luck. its just a test, the answer is going to be so simple I know it. One little thing I haven't done.

[vladimir.nedev]

How big is that cube ? Try disabling Use Height like I suggested.

Greetings,
Vladimir Nedev

[Mnoloconic]

Yep, That did it, cheers Vladimir.