3D textures to Ray Marched SDFs

[glennmarshall]

I originally posted this on a pouet thread - which is dead now, was wondering could anyone here help me..

Here's the original post..

Hi,
I'm interested in using ray marching on a shader (GLSL) to reproduce 3D polygon models. I saw this technique using 3D textures to create SDFs..
http://www.pouet.net/topic.php?which=7920&page=51

This is just what I'm looking for - but does anyone have any source code for this?

also, how would I create the 3D texture from a model in the first place. I have Cinema 4D & Blender.

Thanks for any help..