topic Re: Excluding lights from Vray environmental fog in Maya Shading, Lighting and Rendering Forum

Excluding lights from Vray environmental fog

reniferziolo — Sun, 18 Nov 2018 02:22:25 GMT

Hello fellow Maya users.

I was wondering if there is a simple way to remove a light from the environmental fog (for example a rim light)

In arnold it's as simple as zeroing the volume samples but can't realy figure it out with vray.

Any help appreciated!

kind regards

Re: Excluding lights from Vray environmental fog

reniferziolo — Sun, 18 Nov 2018 03:14:04 GMT

I did assign the fog to the containers shading group. I made the light in question have no effect on the container. It's excluded from the fog but the make invisible chceckbox has no effect. Screenshot attatched:

Re: Excluding lights from Vray environmental fog

damaggio — Sun, 18 Nov 2018 04:34:56 GMT

Vray fog, displacement,object properties and other features work inside of a set, just look in the outliner, there's a plus sign where you can see objects inside the set , I would not use a container for fog, just drag your light inside the environment fog , those will be affecting the fog,

read the docs again , I think is self explanatory there.

good luck.

Re: Excluding lights from Vray environmental fog

damaggio — Sun, 18 Nov 2018 04:52:44 GMT

Also Jennifer , keep in mind there's a dedicated Vray forum at Chaos group you should use to get better assistance.

cheers.

Re: Excluding lights from Vray environmental fog

damaggio — Sun, 18 Nov 2018 05:44:49 GMT

Re: Excluding lights from Vray environmental fog

damaggio — Sun, 18 Nov 2018 06:05:08 GMT

Re: Excluding lights from Vray environmental fog

reniferziolo — Sun, 18 Nov 2018 12:07:37 GMT

Hello and thanks for your detailed explanation. The chaos group forum is read only, I'm waiting for my account approval 🙂

Ok so I didn't mention that I used the environmental override to create the environmental fog, then tried the solution with the container. There aren't any lights in the dropdown menu when using the solutions I just mentioned.

When I create the vray environmental fog on it's own (via hypershade editor) then drag and drop the lights in the outliner it simply doesn't work (i guess it doesnt know what to affect?) Is there a way to force the fog to use custom made light set instead of the defaultLightSet present in every scene? I would like the sphere light to add reflection to the flying soucer only, but not be affetced by the fog at all.

kind regards

Re: Excluding lights from Vray environmental fog

reniferziolo — Sun, 18 Nov 2018 12:24:51 GMT

I'm enclosing the sceenshots that illustrate best what I'm looking and hoping to achieve. First is my current scene in vray with both white and red lights affected by fog. The second on is rendered via arnold. We can see the redlight still affecting the diffuse of the cube but it is excluded from fog.vrayarnold

Re: Excluding lights from Vray environmental fog

reniferziolo — Sun, 18 Nov 2018 12:34:13 GMT

Both of the lights are still visible. Changing the light mode even to "no lights" has no effect on the scene whatsoever

Re: Excluding lights from Vray environmental fog

reniferziolo — Sun, 18 Nov 2018 13:00:18 GMT

Me again. It worked but only if the fog is applied in the containers shading group.

thanks!

Re: Excluding lights from Vray environmental fog

Anonymous — Wed, 24 Jun 2020 09:20:14 GMT

this is really helpfull man thanks a lot