Crystal Ball texture with color?

[detbear]

I'm wanting to get a really nice caustic like crystal ball texture on a shere. A sphere with the look of colored glass. Anyone know of a really nice way to get this done?

[robcat2075]

You already know about refraction. What else are you looking for in the effect?

[robcat2075]

It turns out it's a bit more complicated...

 

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So you need...

 

-the refraction (surface setting)

-slight ripple distortions on the surface (a material noise combiner could do that)

-slight surface reflection also, most noticeable on bright objects. An reflection map might be most convincing.

-color fringing. This can be done with a multipass technique

-the glass itself has a slight green tint to it.

[largento]

You could achieve the color effect using MatCap shaders with a glass sphere image.