The color of the upholstery can be easily changed via instance CoronaColor in the Opacity slot.
UV: available for upholstery;
Materials: CoronaPhysicalMTL;
Corona Render not lower than version 8;
Turbosmooth modifier 2 iteration is used;
The archive includes 3D Max 2021 files; FBX 2012 with temporary standard materials, which must be assigned a MAT (in the archive), containing the CoronaPhysicalMtl model - loaded through the material editor;