e07389ccb8
http://wiki.blender.org/index.php/Dev:2.6/Source/Render/RenderEngineAPI * RenderEngine is now a persistent python object that exists and retains properties as long as a frame is being rendered. This is mostly useful now that more than one callback will be added. * Added update() callback that should ideally be used to export the scene, leaving only the rendering to the render() callback. This is not required to be used at this point, but separating this will make things more thread safe later on. * Added tag_redraw() and tag_update() functions that will be used for viewport rendering. * Internal change: status text is now retained after update_status calls.