View Full Version : Lengthening render times

04-19-2008, 09:59 AM
Can anyone explain why render times for animations get longer with later frames? Why does frame 1 take ten minutes and frame 60 takes more than an hour? Is it a cache issue and can I do anything about it? Running 9.3 on Mac Pro with 2 X 2 quad core, 6 Gb memory and two graphics cards. Activity Monitor shows full CPU usage throughout. (If I stop and restart at the next frame it all speeds up again.)

04-19-2008, 10:35 AM
Disable "cache radiosity".

If something moves(and sometimes this can't be seen), the radiosity keeps building itself up making the rendertimes longer and longer.
This was fixed in LW 9.2, but somehow returned in LW 9.3. I hope it will be fixed in the LW 9.5 cycle.

04-19-2008, 10:38 PM
Thanks Costanel, advice much appreciated.