Vray, bright spots.

[opium43]

So I'm just stuffing around with this external render for work... not much experience with 3D.

 

Before I start putting mats in I did a quick render to look at how the light was gonna be... but I'm getting these seemingly random bright spots (on the inside of the windows on the floor).

 

The model is all from sketchup bar the grounplane which is just a plane... The light is vray sun on a daylight system and the camera is vray camera...

 

My settings are also below.

[REDVERTEX]

use only vray materials !

[opium43]

I'm pretty sure all materials in the scene are vray.

[monkeyman905]

In the vray colour map select sub-pixel mapping and clamp out-put and re render that should help

Edited September 3, 2008 by monkeyman905

[WAcky]

Those spots to me look like a caustics issue.

 

As mentioned, try checking the sub-pixel mapping option and see what happens.

 

Try turning off refractive caustics in the global illumination rollout and see what happens.

 

Try upping the refraction sub divs in your glass material and see what happens.

 

Try fiddling with the refractive caustics options and see what happens.

 

Personally I believe its a bung glass material. Try creating one from scratch if you haven't already and perhaps download a few from vray-materials.de and see if you get the same result with some different glass shaders.

 

edit: considering it was modelled in sketchup, you could also have some funny things going on with the window pane which could be confusing vray. Try replacing them with fresh max ones. An AEC premade one should be adequate.

 

Good luck.

 

Cheers

[opium43]

Sweet, thanks heaps everyone - I'll try those things tonight. I just realised that the panes of glass are actually 2 surfaces... 6mm apart. I think I'll go into sketchup and make them a single surface as well and also adjust all the caustic settings...

 

Cheers, I'll get back to you.

 

P.S. If I join the glass surfaces, so make them a box, will 3dsmax read them as a solid?

[Ky Lane]

Should do, yes. And because it has a surface to enter and exit, refractions will be more realistic.

 

Im waiting for that slab to fall on that guy...

[opium43]

haha, I think there are columns somewhere, I didn't get very detailed drawings to work with... I'm gonna have to remodel it at some point anyway as it's changed a fair bit.

 

I didn't end up getting a lot of time last night but turning off refreactive caustics all together seemed to get rid of them... I'll make the windows a single plane tonight and see what happens...