The leather material is made with textures in 2K resolution

There are two balls with materials in the scene

Corona ver. 8.0
two files in the archive
1. Corona Physical Mtl from version 7.0
2. Corona Legacy Mtl from version 1.5

For Corona render, it is recommended to install version no lower than 1.5, since the glossiness of the materials is adjusted taking into account PBR.

Unwrap UVW
Materials are named logically
Paths to textures have been removed, all textures are in the Maps folder
In the fbx 2009 archive (for each type of material), obj, max_2017, max_2020, Maps