Graphics Library for D

[Ola Fosheim Grøstad" <ola.fosheim.grostad+dlang at gmail.com>]

A small example of a real time path tracer in webgl:

http://madebyevan.com/webgl-path-tracing/

A lot more fun than regular 3D or 2D. If combined with caching 
surfaces, it probably could be used to build a glossy 2.5D UI.