Headlight material problem

[stevesideas]

Hi there,

I have a problem with the headlight material for a scene I am rendering. The headlight glass is a seperate mesh and has a shell mod. It is setup like a normal glass mat. I have tried turning off shadows..affect gi for the object and every other option I can think of but I still get much darker results when the clear headlight object is visible in the scene.

Does anyone have any ideas ?

[simmsimaging]

What is the environment like? Almost looks like it's reflecting a grey environment more than blocking light, but hard to tell. Fire over the material if you want and I will have a look at it - I'm working glass/liquid bottle shots right now anyway, so I'm on theme

b

[stevesideas]

The environment is made up of a cuved edge plane that goes under the car and up in the background and a vray dome light with a hdri in the texture slot.

The actual glass mat is just a diffuse 0, 100% white reflect with fresnel on and 100% refract with affect shadows and ior of 1.532. My usual glass settings.

[sv]

How thick is the glass and how many bounces are you allowing through it? (max depth)

[stevesideas]

The glass is 0.2 mm thick...Ive tried all different amounts of bounce using vrayRT but it doesnt make any difference after you hit about 8-10 and still doesnt have the result im looking for. You would think the a clear material like this with shadows off or affect shadows would allow the same amount of light to come through as if it wasnt there...

[simmsimaging]

It should - I don't seem to have that issue. Not sure how they affect RT, but maybe make sure your Global reflect/refract settings are not being clipped off in the normal Vray settings. Check that your material settings are also high (I use 20/20 minimum for "important" glass objects).

beyond that I don't really know.
b

[Morbid Angel]

check your refractive depth, make sure you get 6 refractions or more. Also make sure you check affect shadows in vray material refraction.

[stevesideas]

Yep, done that..still the same problem

[stevesideas]

Ok. I worked it out. It was to do with the ray amount settings, but it was also to do with the materials under the glass. I set those to 20 on reflection and refraction and now it is rendering fine. Something else Ive learnt today....

Thanks for trying to help

[CreArte]

Hello guys,

I'm having exactly the same issue, have applied all the recommendation in this post but had no success yet, if you guys want to have a look I made a new post, hopefully will be of help for others as well. Here is the link:
http://www.chaosgroup.com/forums/vbu...ms-quot-2-quot