Alstrong said:Is all rendering done at low resolution before the absolute final cut of the CG piece?
No, everything is done with full settings usually... In the begining, when not every element has been completed yet, it's obviously not as complex as the final
CG is an iterative process. You can't see everything if you don't render it out, so most studios concentrate on building a production pipeline that allows very quick turnarounds. Most artists - from animators to lighters - should be able to send out their work to the renderfarm when they go home, and then come back the next day to see the completed renders. This allows them to tweak every detail again and again, until the final deadline.
This is also the reason why raytracing isn't heavily used yet - with the usual scene complexity, it wouldn't allow an overnight render for a few seconds of animation. Its use is usually limited to ambient occlusion (very soft shadows) and reflection occlusion (to create better reflections with simple cube- or spherical mapped enviroment maps), although some studios do try global illumination from time to time (but most of the times they decide never to do it again
Saaay what??
Check the #3 or #4 DVD, I recall that it's been on one of these...