Edge lit glass with the light falling off gradually up the glass

[stevesideas]

What is the best way to do this...if this is even possible with vray ?

I've tried using a blend map with the glass and a vraylightmaterial as the second layer with a gradient mix. This kind of works it just looks like a lit material on top of the glass...

[joconnell]

Can you pop up an example? Are you talking about lighting a glass object or a glass object that has inbuilt lighting? Most of the time what photographers will do is never point a light directly at the object, instead they'll put a white board to the side of the object and shine the light on this instead - you'll get a nice gradual falloff from the hotspot of the light on the white board, and this is what gets reflected in the surface of your shiny glass object. You could mean something totally different though!

[stevesideas]

Here you go:



This is a door that slides. It has a light at the bottom that is visible through the glass. The emitted light is supposed to sweep up the glass and gradually falloff. I've added some fog inside the glass but it didnt really seem to help the light become visible inside.

[joconnell]

Translucency unfortunately, either that or reeeeeealy glossy refractions so that the refracted light blurs up through the object.

[stevesideas]

Ill give translucency a go although I really dont know the best settings for the standard vray material. Ta

[Laserschwert]

How about rendering that element separately? (just a plane with a gradient, and comping it in afterwards)

[jwscott]

To accomplish that I would have a light source under the glass (probably a cylinder or spline with a vray light mtl on it). For the glass material, i would just use a material with a white diffuse color, 100% white reflection with fresnel checked, and the refraction set to something close to white but not quite white. Maybe 220, 220, 220 could work? This is just a simple glass that's almost see-through, but not quite. You have to do this so that the glass will pick up some light...otherwise all the light will just pass through.

[rivoli]

eidt: re read the first post better, I just suggested the same method all over again.. smart.

anyway, just tried the blend mat, and it kind of work. I guess much depends on the gradient and light intensity. here's what I got:



translucency or mapped glossy refraction, as john suggests, might look better though.