Bidir on - off results

joegiampaoli · Post by **joegiampaoli** » Tue Aug 07, 2007 7:42 am

Rerendering this old scene both with exit portals one without Bidir and the other with Bidir, only thing is that Bidir gives me strange artifact on floor, any suggestions?

manitwo · Post by **manitwo** » Tue Aug 07, 2007 7:47 am

sorry ... i've no idea.
but i'm interested which mode performed better for this scene?

joegiampaoli · Post by **joegiampaoli** » Tue Aug 07, 2007 7:50 am

For speed I can see Bidir=On sure does the job faster , Off I think will be more precise but slower.....

manitwo · Post by **manitwo** » Tue Aug 07, 2007 7:59 am

maybe some caustics?? dunno.
i would reduce the scene till the source of the evil is found

CTZn · Post by **CTZn** » Tue Aug 07, 2007 9:49 am

What's the impact of <max_num_consec_rejections> with bidir ? What value are you using (in case it's too low) ?

Kram1032 · Post by **Kram1032** » Tue Aug 07, 2007 10:34 am

I usually, independently of scene mode, use 10000, which is ten times the original standard in the ini and also blendigos maximum.

joegiampaoli · Post by **joegiampaoli** » Tue Aug 07, 2007 7:50 pm

Well I tried setting it <max_num_consec_rejections> to 10000 it was at 100 and I practically got the same result, so I don't know what I'm doing wrong.

Doesn't look like a caustic, doesn't even have the right angle of any object in the scene in relation to the sunlight position. All I have in the window is the exit portal, glass pane, and shades.

The reason why I wnat to do this scene with bidir on is because it really is faster and with it off it just hangs after so many hours and the noise just doesn't go away, it could go on for days and the noise is still there......

BbB · Post by **BbB** » Tue Aug 07, 2007 8:08 pm

I'd really remove the glass panes if I were you. I don't know that they add anything. They just seem to slow you down.

joegiampaoli · Post by **joegiampaoli** » Tue Aug 07, 2007 8:10 pm

hmmmmm, good point, I just hate this perfectionist mind of mine.....

joegiampaoli · Post by **joegiampaoli** » Tue Aug 07, 2007 9:05 pm

Ok, removed window-glass panes, doing it with bidir on and that strange artifact is gone. Thx, I will post results tomorrow....

Kram1032 · Post by **Kram1032** » Tue Aug 07, 2007 9:55 pm

aha... strange, though.

joegiampaoli · Post by **joegiampaoli** » Fri Aug 10, 2007 5:57 pm

Well, result is uploaded already in my indigo gallery, came out nice and better than the original I did first.

Bidir on - off results

Bidir on - off results

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