the problem with glass material and environment mapping

[jensrui]

I use vray 1.5 sp5 in 3ds max to render a vray glass and environment map with vray physical camera. But the Vraysky behind the glass is dark. With 3ds Max standard glass material and Vray physical camera, with normal camera and 3ds max standard material or with Vray glass material and normal camera there is no problem. I post some more pictures and settings with it. How to solve this problem? Thanks! The glass has thickness and I use VraySun.

 

1. Vray physical camera with Vray glass material

settings

 

2.Vray physical camera with 3ds Max standard glass material, glass parameters: Blinn, specularLevel 125, Glossiness 40

 

3.3ds Max camera with 3ds Max standard glass material

 

4.3ds Max camera with Vray glass material

Edited July 23, 2013 by jensrui

[cg_Butler]

Hello.

 

Can you upload your maxfile? Or post a screen grab of your glass settings and your VRay render settings so we can have a look and give you a suggestion.

[Scott Schroeder]

Does your glass have thickness or is it just a plane? Vray can have issues with doing glass on planes. Like Sir Mix-a-lot prefers his ladies, Vray prefers your geometry to be thick.

[Boris Horosavin]

if you are using vray physical camera you need to boost up any light source value (like from 1 to 50, 100 or maybe more). this goes for classic vray lights, as well as vray light maps, hdri maps etc. basically, physical camera is optimized for use with vray sun ONLY, every other light source - you have to turn it up, like quite a lot.

[Boris Horosavin]

PS - don't use standard material for glass with vray, it kinda kills the purpose of using vray at all.

[cg_Butler]

It appears to have no thickness, hard to tell. But if not give it a shell.......

[Boris Horosavin]

here is one more idea: try using vray environment override, from render setup menu. add your vray sky map to both gi and reflection/refraction slots.

[jensrui]

It has thickness and it is not a plane.

[Corey Beaulieu]

Your glass material should be set to pure black and at the moment, with the Sky placed in the GI Override, there is nothing to reflect except your black Reflection Override material.

 

Set the material to black and copy the sky down into the Reflection Override and I believe it will respond as expected.

[jensrui]

It is almost the same with reflection/refraction environment override. It is not black anymor but deep blue. See the picture. It is still not what I expected.

Edited July 23, 2013 by jensrui

[Corey Beaulieu]

What are your color mapping settings?

[atitmistry]

hello,

 

 

here is the excellent vray glass material tutorial.

http://www.proarch3d.com/tutorial-for-v-ray-glass-material/

hope it will help you.