I'm hoping someone has come across this problem and can offer a solution...
When rendering a long (1000 frame) motion study, the time taken for each frame to render out gradually creeps up, until it is maybe 5 times the original speed. If I stop the render, and restart at the same point, the time drops back down again. I'm saving out as TGA files, then compiling later.
I've taken to setting my alarm at 2 hourly intervals through the night, so that I can get up and restart the render!
Thanks in advance for any suggestions.