Displacement artefacts

[gueoct]

Why is my dispalcement texture showing artefacts that derive apparenty from the polygons of the underlying object?

[gueoct]

another example:

[gueoct]

Is it really possible, that none of those 184 poeple that viewed my post has ever encountered / heard of this problem?
Otoy Team please help me, we are in the middle of a project, that should be finished end of the week.
Thanks in advance!

[paride4331]

Hi gueoct,
Your issue is exactly what you said:
"That drifts apparenty artefacts from the polygons of the underlying object".
Two ways to solve:
1 change displacement map mid level (not sure will solve your issue)
2 applies displacement only to polygons you want to displacement (recommended)
Regards
Paride

[gueoct]

i tried option1, did not help.
option2: i do not quite understand what you mean by that.
The Displaced Material is applied to the whole object.
how could i apply displacement only to a certain selection of polygons?

btw. i am using Octane plugin version 2232.191.
is there maybe a known displacement issue in this old version?

[paride4331]

Hi gueoct,
None of your issue is related to the version.
Regards
Paride

[gueoct]

Now i found the problem:
I removed the bump and normal map!

[paride4331]

Hi gueoct,
"Currently, displacement cannot be used together with a normal map on the same material as this would result in rendering artefacts on that material.
The same is true for bump maps although the digital artefacts are less pronounced."
I would recommend you to read some passages from the manual:
https://docs.otoy.com/#standalone-v3-us ... splacement
https://docs.otoy.com/#3ds-max-v3-using ... splacement
Regards
Paride