HELP! Displacement artefacts in texture and triangular lines in rendering

[Nickdae]

Hello together,

I think I have some issues with my displacement map, my textures and my 3D Model. My Texture looks bad when I render. It's the standard Corona Texture from the Texture Library. I have also lines at the triangles inside of one textured element of the wall of the Cinema4D Model.

Can you help me? Can I reduce the Poligons somehow? maybe this helps already? I just found some solutions which destroys my model. But I think the displacement issue will stay.

Thank you!

[Cinemike]

I spot 2 things in your scene:
First, the normals are reveresed which should reverse the displacement. Displacement only "knows" where front and back are because of the object normals. Fix this first.
Second, the topology is bad. There is no sugarcoating this.Corona's displacement is very robust, contrary to some methods the competition uses, but it is not unbreakable, as you can see for yourself. Long triangles will cause problems. If possible, use retopology on the surface. Maybe even the quad-remesher alone will help already. If you need displacement, I do not see any way around that. Remember that some materials rely on working UVs, though. What material are you using?

Michael