Sims 4 texture deforms during camera movements

[Pipikaforum]

I'm struggling with one hige problem for weeks now. I tried to create decorative house (not for living, just for decoration) in sims4studio and blender. Everything looked fine in blender and in studio. I have png baked texture for the model but also I switched to new uv map while I was baking on the old one, or something similar, I can't remember now correctly. The point is, I had 2 uv maps, one original, the other one to replace it, and when I finished the process I deleted the old UV. As I said, everything looked fine in the studio. I changed the mesh to my mesh in every LOD. The mesh is compatible with the game. Everything's good. Until one specific moment. I also replace the old texture with my own in every LOD. When I import the final result in the game, (the format of the texture is PNG that is transparent between the fields with textures that fills the UV places) during rotation and zooming in/out, the model has black parts that change with rotation or zooming. I really don't know what's that but it's really annoying. Please help! I would appreciate it a lot!