Displacement map BUG!!!

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Carrara (Integrated Plugin developed by Sighman)

Displacement map BUG!!!

Postby tschwenke » Sun Oct 09, 2016 6:35 pm

tschwenke Sun Oct 09, 2016 6:35 pm
Hi,
As already pointed out some time ago, there is a bug with displacement maps. In OR Standalone, it seems to work fine, but in Carrara, it gives me black holes in the models depending on the position of the camera :(
It really drives me crazy because I just can't use a displacement map in Carrara :(

Files:
https://www.dropbox.com/s/192860wpwbve6 ... ap-Bug.car
https://www.dropbox.com/s/bhhj3jis5jys3 ... ap-Bug.jpg

Best wishes,
Thomas
http://www.thomas-schwenke.me
Houdini 18.5 || Win10 || i7 + 1 x RTX3080
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Re: Displacement map BUG!!!

Postby Sighman » Mon Oct 10, 2016 7:53 pm

Sighman Mon Oct 10, 2016 7:53 pm
I get the same problem when I export the scene to the Standalone. I will try and get one of the Octane developers to take a look.

Displacement-Map-Bug.zip
ORBX export.
(722.69 KiB) Downloaded 337 times
Win8/64, I7-4770K (3.5Ghz) 24GB, GTX-980ti (6GB) / GTX-TITAN (6GB)
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Re: Displacement map BUG!!!

Postby abstrax » Mon Oct 10, 2016 8:26 pm

abstrax Mon Oct 10, 2016 8:26 pm
tschwenke wrote:Hi,
As already pointed out some time ago, there is a bug with displacement maps. In OR Standalone, it seems to work fine, but in Carrara, it gives me black holes in the models depending on the position of the camera :(
It really drives me crazy because I just can't use a displacement map in Carrara :(

Files:
https://www.dropbox.com/s/192860wpwbve6 ... ap-Bug.car
https://www.dropbox.com/s/bhhj3jis5jys3 ... ap-Bug.jpg

Best wishes,
Thomas

I think it's numerical problems here. To fix it, bump up the ray epsilon to 0.001 and increase the resolution of the displacement map to 2048x2048 or 4096x4096.
In theory there is no difference between theory and practice. In practice there is. - Yogi Berra
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Re: Displacement map BUG!!!

Postby Sighman » Mon Oct 10, 2016 8:52 pm

Sighman Mon Oct 10, 2016 8:52 pm
Hmm, looks like a bug in the Carrara plugin is preventing setting the Displacement LOD greater than 1024x1024. This will be fixed in the next release.
Win8/64, I7-4770K (3.5Ghz) 24GB, GTX-980ti (6GB) / GTX-TITAN (6GB)
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Re: Displacement map BUG!!!

Postby tschwenke » Tue Oct 11, 2016 12:46 pm

tschwenke Tue Oct 11, 2016 12:46 pm
Hi,

Yes, ray epsilon does the trick or scaling up the model. Thank you :)

Best wishes,
Thomas
http://www.thomas-schwenke.me
Houdini 18.5 || Win10 || i7 + 1 x RTX3080
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Re: Displacement map BUG!!!

Postby protovu » Tue Jan 31, 2017 8:07 pm

protovu Tue Jan 31, 2017 8:07 pm
Hi Simon,
I would like to know how to control the projected height of displacement.
In experimenting with the RedSequineKnit, I have displacement, but no real control.
What would enable shorter red columns? The only option currently seems to be no displacement at all?

Separately, is anything happening with the Alpha Image channel?

Thanks for your help,
Rick
Attachments
displacement question.png
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Re: Displacement map BUG!!!

Postby tschwenke » Fri Feb 03, 2017 8:42 am

tschwenke Fri Feb 03, 2017 8:42 am
Hi,

As far as I know, just click the Displacement layer and adjust the height.

Best wishes,
Thomas
http://www.thomas-schwenke.me
Houdini 18.5 || Win10 || i7 + 1 x RTX3080
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Re: Displacement map BUG!!!

Postby protovu » Fri Feb 03, 2017 3:10 pm

protovu Fri Feb 03, 2017 3:10 pm
Hi Thomas,
One would think that would be the case, but nothing happens. You know of a displacement material that responds correctly? I can download it from the DB and see if I have better luck.
Thank you,
Rick
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Re: Displacement map BUG!!!

Postby tschwenke » Fri Feb 03, 2017 4:11 pm

tschwenke Fri Feb 03, 2017 4:11 pm
Hi,

No, works well here. See images. What version are u using?

Feel free to send a CAR file for testing.

Best wishes,
Thomas
Attachments
displace-2.png
displace-1.png
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Re: Displacement map BUG!!!

Postby protovu » Fri Feb 03, 2017 4:43 pm

protovu Fri Feb 03, 2017 4:43 pm
Thanks, Thomas. Nice of you to take a look.

Here is the file.
My Carrara is 8.5pro.
My Octane is 3.03.04.23.
Maybe it us just the Red Sequence Material?

What is the name of the Material that you are showing?

Best,
Rick
Attachments
microoo2.zip
(6.88 MiB) Downloaded 289 times
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