Amber bed from divan.ru it 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.
Polygons that are visually invisible have also been removed for optimization purposes.
TurboSmooth Render Iterers are used to detail the folds:1
At distant angles, you can omit the Iters value, this will help save your computer resources.
Collection of models from divan.ru : https://3dsky.org/collection/shared/5293896