I agree with the last few post; the ability to do multipass rendering would greatly enhance Blender’s ability to fit within a multi-app production pipeline.
The way Blender will really come into its own, vis-a-vis hi-end productions*, is when a studio exploits its open source to come up with an effect that can’t be done in an established commerical app (e.g. Maya). (This is what happended with GIMP re:image processing. ) Multipass rendering would enable Blender to create output that could then more flexiably (sp?) be imported to other apps.
- Not counting pre-viz, as in SpiderMan 2, which is a great feather in Blender’s cap.