Chaos Corona Forum

Chaos Corona for Cinema 4D => [C4D] General Discussion => Topic started by: kmwhitt on 2017-10-21, 22:26:17

Title: Artifacts/Noise after 4 hours
Post by: kmwhitt on 2017-10-21, 22:26:17

I've got a closet design to finish for a client this weekend.  The view cleans up quite fast (within 15 minutes without denoiser), but the area around the neckties continues to show artifacts/noise - see attached.  I have tried different settings to balance the sampling with no luck.  Does anyone have any suggestions on how to get this cleaned up?  Thanks!

Title: Re: Artifacts/Noise after 4 hours
Post by: Gruender on 2017-10-21, 23:23:40

Hey, I don't know whether this will help or not.
As long as this is the only problematic area and you use the same material on all objects, I would guess the prob is in the geometry. Maybe flipped normals or something special which causes those artifacts.
Cheers

Title: Re: Artifacts/Noise after 4 hours
Post by: kmwhitt on 2017-10-21, 23:37:25

Quote from: Gruender on 2017-10-21, 23:23:40

Hey, I don't know whether this will help or not.
As long as this is the only problematic area and you use the same material on all objects, I would guess the prob is in the geometry. Maybe flipped normals or something special which causes those artifacts.
Cheers

Hi Gruender - thanks for the reply.  That's what I thought too.  I created the ties in Marvelous Designer (the geometry is rather dense) and then added a cloth surface modifier to them in C4D to get a little thickness.  I have tried making the cloth editable and the result is the same.  All normals are in the correct direction.  I've tried without the thickness modified too.  I am out of ideas.

Title: Re: Artifacts/Noise after 4 hours
Post by: Gruender on 2017-10-21, 23:54:18

Phong tag?

Title: Re: Artifacts/Noise after 4 hours
Post by: kmwhitt on 2017-10-22, 00:36:48

Lowering the phong angle did the trick.  Thanks for the help!

Title: Re: Artifacts/Noise after 4 hours
Post by: houska on 2017-10-23, 12:49:44

Yeah, this is what we're looking at at the moment. Phong tag does cause some trouble with some objects.

BTW, randomize those boxes, they look waaay too regular :-)

Title: Re: Artifacts/Noise after 4 hours
Post by: kmwhitt on 2017-10-23, 14:04:21

Thanks houska.  Randomizing the boxes in on the list.  I have 6 styles of belt buckles to model today...

Title: Re: Artifacts/Noise after 4 hours
Post by: houska on 2017-10-23, 14:24:15

Another hint for that Phong problem - you can triangularize the geometry. That also helped in our tests!

Title: Re: Artifacts/Noise after 4 hours
Post by: kmwhitt on 2017-10-23, 14:36:59

Thanks.  I'll keep that in mind if I run into any trouble.

Title: Re: Artifacts/Noise after 4 hours
Post by: kmwhitt on 2017-11-02, 15:26:46

Looks like you guys fixed the phong tag problem.  I was able to uncheck angle limit in the Halloween build and the noise is gone...

Title: Re: Artifacts/Noise after 4 hours
Post by: kraphik3d on 2017-11-03, 16:33:44

I have noticed same kind of issues when having a geometry without phong tag. There is no use to run render with corona for 4 hours. Totally unproductive. Just use denoiser to get rid off jaggy edges.

Title: Re: Artifacts/Noise after 4 hours
Post by: kmwhitt on 2017-11-03, 16:37:31

Quote from: kraphik3d on 2017-11-03, 16:33:44

I have noticed same kind of issues when having a geometry without phong tag. There is no use to run render with corona for 4 hours. Totally unproductive. Just use denoiser to get rid off jaggy edges.

I would agree, but it now seems the phong angle issues is fixed.  The above view resolved within a little over an hour (with very little denoising).

Title: Re: Artifacts/Noise after 4 hours
Post by: kraphik3d on 2018-01-05, 16:02:51

Quote from: kmwhitt on 2017-11-03, 16:37:31

Quote from: kraphik3d on 2017-11-03, 16:33:44

I have noticed same kind of issues when having a geometry without phong tag. There is no use to run render with corona for 4 hours. Totally unproductive. Just use denoiser to get rid off jaggy edges.

I would agree, but it now seems the phong angle issues is fixed.  The above view resolved within a little over an hour (with very little denoising).

Yes it´s fixed I think so