You could probably get a *rough* estimate by using the ratio of two 
similar machines' scores from the povbench database:
http://www.haveland.com/index.htm?povbench/index.htm

ie, time on computer A * rating of computer B / rating of computer A

You might be able to estimate different resolutions similarly.

Mostly though, no.  There's just too many variables: differences in 
processor architecture & memory bandwidth, different settings for 
radiosity, different jitter _values_ for antialiasing, different system 
load (even from the OS)

-josh


Timothy R. Cook wrote:

> Is there any way to do a rough estimate of time needed to render any
> given scene when various settings are used with certain computer
> configurations?  I.e. can you estimate how long it would take to
> render five glass spheres with five point lights over a plane at
> resolutions  1600 x 1200   800 x 600   640 x 480   320 x 240
> antialiasing on/off
> radiosity on/off
> CPU 100 mhz  200 mhz  800 mhz  1000 mhz  2000 mhz   6000 mhz
> 
> I'm curious 'cuz it'd be interesting to know how fast a scene I
> have that took 51:09:07 hms at 700 mhz for 640 x 480 would render
> on other machines (without actually trying it on, say, my 486/66)
> 
>

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