Chaos Corona Forum

Chaos Corona for Cinema 4D => [C4D] Bug Reporting => [C4D] Resolved Bugs => Topic started by: peka on 2019-10-04, 10:50:07

Title: Geometry not flat
Post by: peka on 2019-10-04, 10:50:07

I have a problem that I observe in rendering. The geometry is absolutely flat. Not in rendering. With the phisikalischen renderer of c4d it is correct. What is it?
Enclosed all files.

Title: Re: Geometry not flat
Post by: Beanzvision on 2019-10-04, 15:17:35

There's definitely something up with your mesh. I recreated it and it renders perfect now.

(https://forum.corona-renderer.com/index.php?action=dlattach;topic=26411.0;attach=113350;image)

Title: Re: Geometry not flat
Post by: peka on 2019-10-04, 15:44:28

Thank you for your answer. In my mesh I can't see something wrong. And why the physical renderer does not produce the same result?

Title: Re: Geometry not flat
Post by: burnin on 2019-10-04, 16:04:26

Yup, your "Zylinder.1" model is bad.

(https://media.giphy.com/media/KFWGcOvaanz5s1ZgNY/giphy.gif)

Same here, I made a new one to show you there's nothing wrong, if you do it right.
(https://media.giphy.com/media/Kd4ks3F1tIoypvWuHl/giphy.gif)

Quote from: peka on 2019-10-04, 15:44:28

Thank you for your answer. In my mesh I can't see something wrong. And why the physical renderer does not produce the same result?

Guess Maxon devs made some tricks in the back to allow minor tolerances. Even ProRender shows your mesh fine.

Have fun!
:)

Title: Re: Geometry not flat
Post by: peka on 2019-10-04, 18:29:55

Thank you very much for your persuasion! Then I will take a very closer look at my mesh. With fun of course ; )

Title: Re: Geometry not flat
Post by: peka on 2019-10-07, 10:10:49

I sent the link to MAXON Support and received the following response:
I cannot detect any errors in your object and can therefore not understand the statement that the object is faulty.
Here one of the Corona developers would have to do a check, which causes the problem and then get in touch with our development team so that they can check it there.
Unfortunately, we don't have this option.

Title: Re: Geometry not flat
Post by: burnin on 2019-10-07, 16:03:35

OK, I found it... it's the Material.1 texture tag!
You are using Displacement with that material.
Do something about it and Play on... yup, your bad ;)

Title: Re: Geometry not flat
Post by: houska on 2019-10-07, 16:22:38

The issue is caused by displacement in your Corona materials

Title: Re: Geometry not flat
Post by: peka on 2019-10-07, 16:54:57

Thank you Burnin and Houska
It was definitaly the displacement channel in the white materials under the pink one. When I turn it off, it renders correct.