Author Topic: Interesting Showcase of how small changes impact render time  (Read 10073 times)

Offline FrankB

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Interesting Showcase of how small changes impact render time
« on: December 22, 2006, 11:47:32 AM »
VisionBlue has rendered two of the same images, with just slightly modified settings.
The perceived overall quality is close to identical, while he was able to save ~47% render time.

All details in the images below:

Example 1:
http://hitkarussell.de/virtuellart2/terraart/terragen/testrender1.jpg

Example 2
http://hitkarussell.de/virtuellart2/terraart/terragen/testrender2.jpg

Cheers,
Frank
« Last Edit: December 22, 2006, 01:00:09 PM by FrankB »

Offline FrankThomas

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Re: Interesting Showcase of how small changes impact render time
« Reply #1 on: December 22, 2006, 11:53:12 AM »
ummm you know those are both the same file ?
(I assume the second one is testrender2.jpg)

and for the record, I prefer the second one for some reason

Offline EoinArmstrong

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Re: Interesting Showcase of how small changes impact render time
« Reply #2 on: December 22, 2006, 12:26:20 PM »
AA really hammers you, apparently.  The quality isn't so noticable for this (low/medium-sized render), but AA might have a much larger impact on large renders.  Still, this is really useful to know - thanks!

Offline Njen

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Re: Interesting Showcase of how small changes impact render time
« Reply #3 on: December 22, 2006, 12:33:46 PM »
I don't think it's the AA, but more to do with the Detail and GI settings. AA is just a 2D post process and is quite cheap compared to the other settings in terms of cpu power.
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Offline oggyb

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Re: Interesting Showcase of how small changes impact render time
« Reply #4 on: December 22, 2006, 03:40:34 PM »
I'd hazard a guess that the biggest increase in time will be got from GI.  I have mine on 1 for the renders I've done so far.  2, and the render time almost doubles.  3 and I have to cancel at bed time ;)

M.

Offline Oshyan

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Re: Interesting Showcase of how small changes impact render time
« Reply #5 on: December 22, 2006, 10:12:46 PM »
GI does have a significant impact. AA should be relatively less so but still has a definitely effect. It's good to see concrete example that "higher is not always better". In fact I prefer image #2 as well, with the lower settings. I do find it odd that he used such a strange and precise decimal value for detail in the 1st though. It would have been a better test if detail had been the same and only AA and GI changed.

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