Raytracing with GLSL

Hi @all,
does anybody know whether it is currently possible to use raytracing within GLSL vertex or fragment shading? And how cost effective it is?
Thanx in advance

I think it is. There was a mention of raytracing in the orange book and in the presentation of the Unreal 3 engine they speak of being able to do “ray tracing effects” on the GPU - don’t know what that means exactly

There’s no limitation in the actual language as such that would keep you from implementing some kind of ray-tracing. The problem is rather hardware support.

Nice paper regarding this subject.

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