Hey guys, I always contribute my opportunity to work in the games industry to being on polycount and the people that I learned from on this site. I released a course on creating materials for beginners for Unreal. Polycount has always been so great to me that I have free codes to give away! So feel free to give the course…
To check if it's related to the meshes, you could assign the material to an unreal cube or sphere and check if it works there. Don't know how those materials are set up, but often times the UV tiling is parameterised, so it can be overwritten in material instances.