Very oldschool subject, but it’s unfortunately something I’ve run into a couple of times lately. I won’t go as far as to say that vray3.x seems more sensitive when it comes to GI… but yeah. I’ve never had theses problems prior. I’ve set up a very simple scene. Basicly, a hollowed out box, with two …

Here’s the scene: blotchy_max2015.zip (63.3 KB)

The lights are very close to the geometry inside the light fixtures and this causes a lot of bounced light from inside those fixtures. To reduce the noise, try moving the lights down just below the fixtures and maybe use rectangle/disc lights instead of spherical ones. Best regards, Vlado

Thanks for a quick reply. I did try with disc lights, and that did solve the problem - to some extent. I get rid of the blotches, but the lighting looks very different. The point of having a pendant like the one in the scene is to spred the light in a certain way. Same goes for moving the lights do…

[image] How do I achieve this finish in Vray? I did try with disc lights, and that did solve the problem - to some extent. I get rid of the blotches, but the lighting looks very different. The point of having a pendant like the one in the scene is to spred the light in a certain way. Same goes fo…

Mm, right. Just a thought: Would it be possible to pre-calculate a sort of IES for any light fixture? So in this case, I’d model the lamp, add the light, then pre-calculate it, then use it in my scenes, as an IES? Think it could solve a whole lot of problems.

[image] About vray 2 license after upgrading to 3 and backward compatibility. Mm, right. Just a thought: Would it be possible to pre-calculate a sort of IES for any light fixture? So in this case, I’d model the lamp, add the light, then pre-calculate it, then use it in my scenes, as an IES? Think…

Cool! Looking forward to the next vray version then! ;D In the meantime, I’ll use the workarounds. Been trying to get to the bottom of this for some time, and I think I have. A combination of tweaking MaxRayIntensity, while moving the lights and upping IM subdivs seems like the best way of quickly …

Blotchy GI

V-Ray for 3ds Max V-Ray for 3ds Max :: Issues

vlado October 27, 2015, 6:03pm 7

It is possible in theory, yes.

Best regards,
Vlado

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Blotchy GI

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