Hi @User-31e3dcabf2,
I do believe @nande is correct in saying the main issue is a moire effect. This page is a fantastic breakdown of how the moire of texturing occurs in game engines and some methods to help it (including a Unreal version of the example shader that you could try implementing).
You can also try adjusting some texture settings. Moire in Unreal is caused by the texture filtering contradicting the pixels of the screen, and changing how your texture process as it gets further away can help fix this. I wish I could find the video that taught me this, because it was really great, but here’s another video that kinda explains how filtering works. A few settings to play with to help your texture filtering:
Mip Gen Settings: Before/After
This will most likely be the thing that helps. This directly tells the engine how to handle the texture evaluations at further distances. Using the Sharpen should help you keep crisp lines at further away
Filter Method:
This determines how smooth the texel interpolation is- in order of smoothness. Playing with these settings might also help you with your aliasing / moire.
Good luck! Let me know if this helps! Remember that to see results you’ll have the most luck making changes to your basecolor and your normal map.