Dimming Light

[stuzzzzie]

How do I Dim the lights of the overall global illumination? Also how do I get soft shadows around surfaces. I am trying to get this type of affect...http://www.archinect.com/gallery/dis...lbum=5&pos=269.

Let me know. I would truly appreciate it.

Cheers.

[Micha_cg]

Re: Dimming Light

Why nobody use my starterkits?

http://asgvis.com/index.php?option=c...90&topic=631.0

[dalomar_cg]

Re: Dimming Light

What that is, and what your looking for, is a special shader called Ambient Occlusion (AO). In V-Ray terms its a shader called V-Ray Dirt that hasn't made its way into vfr yet.

You can get pretty close to that affect by doing a little trickery though...Basically, the more light bounces you have the more things like crevasses and corners will be lit, thus having less contrast. By keeping the amount of bounces to very few, you can actually get pretty close to this affect. So that will require managing your secondary bounces...don't use LC because its too bright-DMC is better. You can decrease the Secondary bounce multiplier and/or limit the actual number of bounces in the DMC GI rollout. Something that also helps is a levels adjustment in the viewport, and also if you add the GI channel you can get pretty good results from that.

Note that this technique only really works well when you have a scene that is largely open to the sky (be it an arch exterior or a product). Things like interiors won't work well with this technique.

[stuzzzzie]

Re: Dimming Light

dalomar,

thanks for the great advice! this is just what i needed...and let me say i have been looking for ambient occlusion for a while and vray for rhino needs to have that in. thanks again ill take your advice.

stuzzzzie

[Micha_cg]

Re: Dimming Light

It's also possible to do the same with LC, only the secondary GI engine multiplier must be changed at a low value like 0.1 or 0. I tested it here and there is no big difference between QMC (bounce 1) and LC (multiplier 0).
The LC is important to speed up the calculation of reflections.