I Need Help with Colored Lighting Effect

[danb4026]

I have a scene where I have to illuminate a white frosted glass object from within with a purple light, so it glows purple but is obviously white frosted glass. The problem I am having is that when I change the color of the light to the purple I want, it provides very little light (at the same intensity if the light it white, it is very bright). When I turn the lights multiplier up to a sufficient level the purple becomes pink and so does my glass.

 

I know that white = bright, but what can I do to get a deep purple light illuminating from within and glow??

 

Help needed!!

 

The object is the entry surround, shaped like a chamfered rectangle.

 

The 2nd attached photo similar to what I want....glowing from light within. But it has to have a more frosted glass effect...maybe some falloff.

Edited January 27, 2010 by danb4026

[Crazy Homeless Guy]

Have you tried painting a glow map the way you want it to look, and applying it directly to the frosted glass? The centers would be brighter than the edges, etc...

[danb4026]

Travis....please explain what you mean by a "glow map".

[erickdt]

I think he means make it a texture in Photoshop and apply it to your object as a VRay light material. This would probably be the most controlable way of doing it although Ihave always had issues with VRay light materials RGB values in LWF. You'd need to mess with it to get it 100% perfect within MAX (IOW without tweaking the final render in Photohop).

 

You could also try to achieve this effect by making your frosted glass material then placing another object with a VRay light material behind it. The VRay light material object should be your purple color. Right click on the light object and crank up the "generate GI" value unitl you get the desired result.

 

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[erickdt]

Ta-da...

 

For this I made my frosted glass material and applied it to my plexi "shell". I then made a VRay light material and applied it to my inner shape which a slightly inset arch structure with all of its edges rounded. I then cranked up the generate GI value within that objects VRay properties.

 

In order to make the purple display correctly I used a VRay color map in my VRay light material's color slot. This way I could gamma correct the output color from within the material. I also had "direct illumination" checked.

 

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[danb4026]

Eric....that's great! Never thought of the vraycolor to gamma correct...good idea.

 

Did you use a shell modifier, or actuall model the inner shape and place inside?

 

What is your vray light multiplier and GI multiplier?

Edited January 27, 2010 by danb4026

[erickdt]

I used the shell modifier.

 

My Vray light value was simply 1 the generate GI value was 10.

 

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