Markful divan ru has different versions of the material :
Corona Physical and Legacy
Vray and supports Vray GPU
The grid of the model has been optimized, the edges that do not affect the shape have been removed.
TurboSmooth Render Iterers are used to detail the folds:1
From further angles, you can reduce the Iters value, this will help save your computer resources.
Collection of models from divan.ru : https://3dsky.org/collection/shared/5293896