POV-Ray
I like to hand-code POV-Ray scenes and think there should be more visual references and advanced tutorials for the POV-Ray SDL.
References
A few people have posted visual POV-Ray references.
O p e n W i k i - POV-Ray Wiki
Portfolio–The standard POV-Ray portfolio rendered
Christoph's page - crackle form parameters
Christoph's page - crackle metricoffset parameters
POVObjects -
Tutorials and Tips
There are a few tutorials around.
POV-Ray Book Project - Home Page
POV-Ray POV-Ray 3D Rendering - Wikibooks, collection of open-content textbooks
4 tips to improve a simple POV-Ray scene
Contributions
So far, I've posted one and have some under development.
Rendering Services
These are resources available to render POV-Ray scenes.
IMP: The Internet Movie Project
Amazon EC2 10¢/hr/instance
Discussion