Quote - Yes, but for renders that depend a lot on IDL, that pass takes the most time. I'd like some opportunity to study the red ant distribution, but not sacrifice all that CPU time.

Restartable renders would be much preferred.

Whichway

Whichway you are further along in IDL then most. Since the IDL pass takes longer then the actually render, can you think of a reason you would want to store the .icache file created on your harddrive during precalculating for re-use. If you change the lights in anyway not good. If you moved the camera, not good....just thinking out loud with a really wild and dumb thought. 

Gary

"Those who lose themselves in a passion lose less than those who lose their passion"