Cineversity

Hello C4D-fellows,

maybe this issue was already discussed somewhere, but I couldn´t find any Information in the forum.

I sculped an object and baked the normal and displacement map (method: tangent). Due to the need of a right and a left version of the object, I copied it and mirrored it by changing the coordinates to X: -1.
Unfortunately the normal/displacement of the object is now “inside out”.

I had following ideas for a solution, but they didn´t work out:
- changing the texture tag coordinated to X: -1
- flipping X and/or Y of the normal map in the material editor

Does anyone know how I could mirror the object properly?
Help will be very appreciated.

Hi AnSa,

I assume the Symmetry nor the Mirror Tool gave you what you needed.
screen capture
https://www.amazon.com/clouddrive/share/fcPBnrMNyGhPw9OzDWxwYb7COf1hpb367iXFpKURYNA

Your questions:

The S.X = -1 can be quickly healed with an Empty Polygon as a parent and then use: Object Manager> Objects> Connect Objects + Delete.

The Normals can be fixed with Mesh> Normals> Reverse Normals.

The Flip X should work, check if the result requires it at all. My set ups here do not require it in Tangential mode.

(Testing it in different scenarios, I saw rarely problems, e.g., the Normalizer doesn’t need a red flip.) If the Flip X is required, test this, it needs a copy of the material of course.
I would suggest to bake the Normal after the mirroring. (Note: Flipping UV Polygons didn’t help in such cases, as it changed the texture as well.)

Here is a little screen capture:
https://www.amazon.com/clouddrive/share/q1EZ2Jv6gOiJEigCN3Xk2KMJ0apqSEJyfzK2nRObGtZ

Let me know if you like an upload link, so I can explore your object.

All the best

(edited)

P.S.: since the sequence of mirrored textures, reversed Normals and the resulting question of reversing the Red channel while in tangential mode is kind of a riddle, I like to share this screen-capture and project file.

I hope it clears things up. All the steps seems to place the colors as they should.

Screen capture, project file
https://www.amazon.com/clouddrive/share/aPvWplNqBwAtWDrEStdJ6mrG6K06lshxelSQ9pl5IJ2

Dear Dr Sassi,

thank you very much for your help.

I would like to handle the left and the right object separatly, so I can‘t use the Symmetry here.

The Mirror Tool seems to mirror the Polygon Normals too, so the normal and displacement map is also inside out. But your Reverse-Normals-tipp puts things straight again

Your other suggestions work as well. The Mirror Tool seems to be the most effective for me as I prefer to have only one material. My texture (in Colour – Effects – Projector) does not cause any problems so far.

Again thank you very much!

You’re very welcome, AnSa, thanks for the feedback.

Nice that you found what you needed.

As a little side note, ignore it if there is no interest:
The Symmetry object can be made editable [C], and the result put into Mesh> Conversions> Polygon Groups to Objects. But if the original object was created out of several polygon Groups, this needs additional work to merge those. I mention it here only, to provide a piece of complete information.

Have a great start into your week.