Directional Scattering OSL Shader

I wrote a directional scattering shader (OSL) that is able to scatter images relative to the geometry of the model. It's a pretty neat tool in a shading toolkit, but there's a little setup involved. The input for this example was a simple curvature map.

This workflow should work for all raytracers that support OSL.
http://zenopelgrims.com/directional-image-scattering/