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why Arnold 3.2 Cpu is working 10 times slower than previous release?

7 REPLIES 7
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Message 1 of 8
elias3d
486 Views, 7 Replies

why Arnold 3.2 Cpu is working 10 times slower than previous release?

Hi, im having this issue.

the Same scene is rendering 10 times slower than the previous version . Same final quality. No skydome.

changed the sss mode back to diffusion (but it wasn't making any difference)

Even AA sampling in 1 and everything else in 0 takes to much time for the result it shows.

Any ideas?

im downgrading for the moment. in this condition it is not viable to work with

thanks!

3774-compare.jpg

7 REPLIES 7
Message 2 of 8
thiago.ize
in reply to: elias3d

Can you enable verbose logs and render with both versions? That should hopefully give an indication of what's going on.

Message 3 of 8
teddude75
in reply to: elias3d

Look at your thread count at render time. In Arnold 3.2 I get 80% of my threads going and turning off auto detect threads helps.

Message 4 of 8
Slava_91
in reply to: elias3d

what SSS mode you use in 3.2 and 2.0?

Message 5 of 8
elias3d
in reply to: elias3d

The mode changes automatically from diffusion to randomwalk. ive changed back to diffusion though and the changes in render time are very small

is not a sss problem. the hair takes for ever to render

Message 6 of 8
lee_griggs
in reply to: elias3d

Are you using Extra Samples? What are your Ray Depth and Light sample settings?

Lee Griggs
Arnold rendering specialist
AUTODESK
Message 7 of 8
Slava_91
in reply to: elias3d

Yes I see same problem in work scene without sss, but in seconds slower
3min per frame on 5.2 core and 3.5min per frame on 3.2 core

Message 8 of 8
Stephen.Blair
in reply to: elias3d

It's hard to tell what's going without some logs, or a scene.

It's xgen hair, right? Is the slowdown in the actual rendering or in scene initialization?



// Stephen Blair
// Arnold Renderer Support

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