OK, thanks for the comeback. So far my modifications have been minor [adjusting light levels, etc.] but I have always started at Frame 0 and updated at each keyframe. However; I will consider myself warned about the 'squirrel factor' in C2. I plan to upgrade to C4 soon.

I've seen some great C4 landscape stuff in the Gallery section. Is C4 competitive with Bryce and Vue these days?