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Bidir on - off results

Posted: Tue Aug 07, 2007 7:42 am
by joegiampaoli
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?

Posted: Tue Aug 07, 2007 7:47 am
by manitwo
sorry ... i've no idea.
but i'm interested which mode performed better for this scene?

Posted: Tue Aug 07, 2007 7:50 am
by joegiampaoli
For speed I can see Bidir=On sure does the job faster , Off I think will be more precise but slower..... :?

Posted: Tue Aug 07, 2007 7:59 am
by manitwo
maybe some caustics?? dunno.
i would reduce the scene till the source of the evil is found :)

Posted: Tue Aug 07, 2007 9:49 am
by CTZn
What's the impact of <max_num_consec_rejections> with bidir ? What value are you using (in case it's too low) ?

Posted: Tue Aug 07, 2007 10:34 am
by Kram1032
I usually, independently of scene mode, use 10000, which is ten times the original standard in the ini and also blendigos maximum. :)

Posted: Tue Aug 07, 2007 7:50 pm
by joegiampaoli
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......

Posted: Tue Aug 07, 2007 8:08 pm
by BbB
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.

Posted: Tue Aug 07, 2007 8:10 pm
by joegiampaoli
hmmmmm, good point, I just hate this perfectionist mind of mine..... :?

Posted: Tue Aug 07, 2007 9:05 pm
by joegiampaoli
Ok, removed window-glass panes, doing it with bidir on and that strange artifact is gone. Thx, I will post results tomorrow....

Posted: Tue Aug 07, 2007 9:55 pm
by Kram1032
aha... strange, though.

Posted: Fri Aug 10, 2007 5:57 pm
by joegiampaoli
Well, result is uploaded already in my indigo gallery, came out nice and better than the original I did first.