glass burns the background

[theweasel]

Well, when i do an interior scene, or even an exterior one that has a see-through wall... the glass affects the colors of my background. Though I would expect it to sligthly desaturate and darken, the effect is opposite.

 

I tried the change from liniar to exponential... because it really is the only thing it crossed my mind. The results were dissapointing: less contrast and saturation for the whole render and almost the same effect with the glass.

 

I have to mention that i used several glass materials, including some downloaded ones.

 

These scenes that seem to be affected by this are all modeled in ADT2005. when i created a simple scene in max... it didn't seem to get the same bad results

 

any ideeas?

[olbo]

Heya Iulian,

 

first I thought that your problem is related to this post,

but then I read your last sentence and now I think that

there might be a problem with the mesh itself. Did you

doublecheck the mesh for unwelded vertices and stuff?

 

 

take care

Oleg

[Clifton Santiago]

Can you post an example rendering of your problem?

[theweasel]

after some renderings last night i got the same effect with a reflecting dome.

(that was setup like a mirror)

[Clifton Santiago]

It looks like you are using Raytrace materials? Raytrace materials do not work in Vray because Vray only raytraces Vray materials.

 

For a simple clear glass in a Vray material: Set you diffuse color to black, reflection swatch to white, click fresnel reflections, and set your refraction swatch to white. Increase the reflection amount by unlocking the fresnel reflection IOR and setting it to like 2.2.

[theweasel]

i wish i were using raytrace mats... but i don't. That's the first thing i learned about vray, using only vray materials... so, it's not that...

[Kurt]

Have you tried this?:

 

"to let the light pass correctly trough a glass wall you have to check (in the GI -Indirect illumination- general settings) the GI caustics to reflect and refract, doesn't matter if you don't check caustics on in the caustics tab"

[theweasel]

i just tried the second render again... and it seems it doesn;t do it anymore... thing is I don;t remember what i changed since i tried that render...

I want to know if anyone has ever ecountered this problem... and if so, what has to be done to get rid of it. Because ... when rendering under pressure (being a student isn't easy you tend to forget all the small changes you make to achieve a certain result and i just want pinpoint the problem so I can avoid it in the future