Author Topic: C4D: Displacement map tears edges apart  (Read 2810 times)

2020-02-17, 18:35:38

nkoe

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Hello,

this is probably an easy to solve issue, but it keeps following me on every model that I work with until I disable Displacement maps.

I usually export from Rhino or Archicad in obj, fbx or 3ds file formats.

No matter what file format, the Displacement map always explodes my geometry.

I tried inverting Normals, using a Bevel or Optimizing. Optimizing though creates very strange round deformations - visible in the image attached.

C4D model: https://we.tl/t-rDtLOQlC2G

How can this issue be solved?


2020-02-17, 20:21:07
Reply #1

houska

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Your mesh is not connected. This is the issue of how it was exported.

You have two options:
  • Fix the export
  • Repair the mesh afterwards

I was able to fix your model by first merging all the relevant mesh parts together using Mesh -> Conversion -> Connect Objects and then by welding the vertices using the Connect modifier (see the attached image). I also had to delete the phong tags, which were incorrect for some reason. The displacement size of 2cm was also a bit too high, I think, so I lowered it to 0.5cm.

2020-02-17, 21:21:03
Reply #2

Designerman77

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Generally in C4D, if the displacement tears your edges apart: edges - optimise.

Works always. Your edges will stay stitched together.

2020-02-17, 22:16:24
Reply #3

nkoe

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Thank you for the help!

@houska: How could I fix the mesh in the first place?

2020-02-18, 07:30:05
Reply #4

houska

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@houska: How could I fix the mesh in the first place?

I'm afraid I cannot help here. This is a matter of correct setup in your exporter and you mention Rhino or Archicad. I have zero experience in any of those two.

2020-02-18, 09:43:28
Reply #5

nkoe

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@Designerman77: Edges optimize creates the problem I mentioned initially and that is visible in my attached image. Do you know how to solve that?

2020-02-18, 09:59:18
Reply #6

nkoe

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@houska: I tried to reproduce your solution, but I noticed it creates the same problem of strangely rounded geometry that I receive with using Optimize. Can you tell what is the problem here? Thanks a lot!

Here is the file again: https://we.tl/t-5Nu02G7Dsp

2020-02-18, 10:11:59
Reply #7

houska

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You have to play with the phong mode in the Connect object. Otherwise it will create a phong tag for you, which you don't want in this case...

2020-02-18, 10:28:33
Reply #8

nkoe

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I noticed that disabling the highlighted conversion option during import and using Optimize on the complete geometry also resolves the issue completely. Thanks again for your help.