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Kerkythea Rendering System • View topic - Path tracing - Black soft shadows
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Path tracing - Black soft shadows

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<<

FGomes

KT-Senior

Posts: 56

Joined: Sat Nov 15, 2008 1:42 am

Location: Portugal

Post Wed Apr 11, 2012 9:20 pm

Path tracing - Black soft shadows

Im having a problem with path tracing presets...

On path tracing quick and progressive, the shadows appear normal... but in path tracing medium and high, the shadows are very dark or black...

Does any one can help me with this question please?

Thanks
Gomes
Attachments
15_Path Tracing - Medium.jpg
Path tracing medium
14_Path Tracing - Low.jpg
Path tracing low
13_Path Tracing - Quick.jpg
Path tracing quick
<<

FGomes

KT-Senior

Posts: 56

Joined: Sat Nov 15, 2008 1:42 am

Location: Portugal

Post Wed Apr 11, 2012 9:22 pm

Re: Path tracing - Black soft shadows

The shadows are realy bad... :(
Attachments
16_Path Tracing - High + AA 0.3.jpg
Path tracing high
17_Path Tracing - Progressive.jpg
Path tracing progressive
<<

tridem

KT-Master

Posts: 982

Joined: Tue Aug 04, 2009 9:25 pm

Location: Treviso - Italy

Post Thu Apr 12, 2012 7:04 am

Re: Path tracing - Black soft shadows

:shock: that's really weird... it seems not related to global illumination since the trees and other objects look correct. Also it's hard believing that is a material issue since there's more than one (ground, grass, car paint...)
Could you share the scene?
<<

Fletch

KT-Team
KT-Team

Posts: 8564

Joined: Fri Oct 27, 2006 2:38 am

Location: Milwaukee, WI USA

Post Thu Apr 12, 2012 9:01 pm

Re: Path tracing - Black soft shadows

I've never touched them, why not just render with PTprogressive, and forget about it?


<<

FGomes

KT-Senior

Posts: 56

Joined: Sat Nov 15, 2008 1:42 am

Location: Portugal

Post Sat Apr 14, 2012 4:08 pm

Re: Path tracing - Black soft shadows

<<

tridem

KT-Master

Posts: 982

Joined: Tue Aug 04, 2009 9:25 pm

Location: Treviso - Italy

Post Sat Apr 14, 2012 6:19 pm

Re: Path tracing - Black soft shadows

don't you have an online storage service?
If you want to join a free one, the following are my invitation codes (subscribe with them in order to get additional space)
dropbox: http://db.tt/7V3CQ6Kv (2GB+ 500MB free and further 500MB for each invitation)
sugarsync: https://www.sugarsync.com/referral?rf=0 ... vent=40167 (even better for space and tools: 5GB + 500MB free and further 500MB for each invitation)
Both allow you to share the files you want to

Anyway... since path tracing progressive is commonly considered the best choice for that kind of scene you could set the max number of passes at a lower value, so that it stops itself earlier.
Apply the preset #17 in the render window, then exit without launching the process.
Then in the advanced settings you can set the number of iterations (10000 by default), just double click on the number to change it.
Finally start the render using ##custom settings## as render method
2012-04-14_2003.png
<<

FGomes

KT-Senior

Posts: 56

Joined: Sat Nov 15, 2008 1:42 am

Location: Portugal

Post Sat Apr 14, 2012 10:00 pm

Re: Path tracing - Black soft shadows

Humm... Am I wrong or PPT doesn`t have AA????

Do you think that creating a new render preset with 160 passes and with AA to 0.1 should be good or do you have any tweaks to suggest?

Thanks tridem! :)

Still waiting for experient opinion of Fletch!! :)

Here is the scene!

http://www.4shared.com/file/S61lqIXp/teste_2_2.html
<<

tridem

KT-Master

Posts: 982

Joined: Tue Aug 04, 2009 9:25 pm

Location: Treviso - Italy

Post Sun Apr 15, 2012 4:06 pm

Re: Path tracing - Black soft shadows

your scene lacks the textures...as it is I'm not able to reproduce the problem
Default value of AA for PTP seems to be 0.3 that is faster than 0.1, as for the number of passes I think 160 is a bit too much, perhaps try yourself at which value the image is clean for your purposes
<<

Fletch

KT-Team
KT-Team

Posts: 8564

Joined: Fri Oct 27, 2006 2:38 am

Location: Milwaukee, WI USA

Post Mon Apr 16, 2012 8:27 pm

Re: Path tracing - Black soft shadows

I agree with completely with everything Tridem said.


<<

FGomes

KT-Senior

Posts: 56

Joined: Sat Nov 15, 2008 1:42 am

Location: Portugal

Post Tue Apr 17, 2012 11:18 pm

Re: Path tracing - Black soft shadows

Here is the file...

Thanks you all!
Gomes

http://www.4shared.com/rar/1wAVGJ0J/post.html

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