Interesting Showcase of how small changes impact render time

Started by FrankB, December 22, 2006, 07:47:32 am

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FrankB

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

FrankThomas

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

EoinArmstrong

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!

Njen

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.
Please support my Kickstarter for my animated film, Cyan Eyed (using Terragen)!

oggyb

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.

Oshyan

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.

- Oshyan