I think the reason why the textures act like this is because there's no shader or something like that fix this. I'll showcase a comparison just to prove that it is a bug. Normal Steam version: <img width="1920" height="1080" alt="Image" src="https://github.com/user-attachments/assets/9cbbca55-5d33-4d2d-8b10-448f10428487" /> Unity version: <img width="1920" height="1080" alt="Image" src="https://github.com/user-attachments/assets/c49728a6-f143-4b53-ac60-419bfbdb2590" />
I think the reason why the textures act like this is because there's no shader or something like that fix this.
I'll showcase a comparison just to prove that it is a bug.
Normal Steam version:
Unity version: