Some 3D models don't have texture coordinates which avoid this kind of effect on the left and right sides of an object. The solution would be to modify the 3D model in a program like Blender to generate texture coordinates, but if you never used such a software, it might be quite complicated for ...

https://i.imgur.com/WEtdua6.png

So I'm fiddling around with some of the models I have in a build I'm working on. I'm using the included 3D model of the grey "Sofa" that comes with the download. In order to achieve a level of realism, I'm changing textures of many of the models I have to, well ...