Am 06.07.2012 12:22, schrieb Invisible:

> It might be useful if POV-Ray could actually try to estimate the time
> remaining. It's not especially useful looking at the average PPS for the
> entire scene.

Estimating the time remaining is pretty difficult, as you'll often have 
very inhomogenous complexity across the entire image. The sky, for 
instance, is usually comparatively simple; the main motif - typically in 
the center of the image - is usually quite complex; and the ground may 
(or may not) be quite easy again. So any naive prediction is doomed to 
be wrong, and may be off by orders of magnitude.


One attempt that might make sense would be to use a more-or-less random 
ordering of SMP render tiles, and estimate the remaining time as (blocks 
remaining)*(total time spent for the actual render)/(blocks rendered).

That still doesn't help with render time estimation during photon 
gathering, radiosity pretrace, or even mosaic preview (anti-aliasing 
requirements may be inhomohenous across the image without any necessary 
corellation with per-ray render time).

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