[Bf-committers] Challenges for distributed rendering

[Campbell Barton]

> Second best would be a way to manipulate all data on save time, perhaps
> by employing a visitor pattern.

We have most of this done already:
http://www.blender.org/documentation/blender_python_api_2_71_release/bpy.utils.html#bpy.utils.blend_paths

This uses `BKE_bpath.h`, from Python its read-only, but from C a
callback can be given to manipulate the path, we could add support for
a Py callback too.
Though libraries are still an issue since any changes won't get saved.