So I'm in the process of rendering a picture with an infinite terrain in it.  I have it set on user settings (I forget the exact settings, but it's nowhere near as high as I've been using recently) and so far it's been stuck at the 15% prepass for, well, about 10 hours.  Now, part of me thinks that it might actually be continuing to render nonetheless, but I'm not sure how long I'm willing to wait.  By this I mean that I'm wondering if it's not actually at 15% of the prepass but that, due to the extreme nature of infinite terrains, the computer might have frozen that number, so to say, while it's actually continued beyond it.....sheesh, sometimes I really wish I knew the exact terminology....anyway, any advice? 

Also, the "time left" hasn't changed at all either, which also leads me to believe that the numbers might just be frozen.  Normally it changes a lot, and it hasn't in about 10 hours. 

So I think I'll let it continue throughout the day and see if it eventually finishes, but I'm not sure if I'm willing to go for two or three days without knowing if it actually has just completely frozen.

Well, thanks again!