Samet chair:
470 x 505 x H 760 mm
https://kirov.inmyroom.ru/products/1931943-stul-plastikovyj-samet-bezhevogo-cveta 

Without Turbosmooth modifier:
Polys: 3,738
Verts: 3,721
With Turbosmooth iterations 1 modifier:
Polys: 29,876
Verts: 14,928

The Turbosmooth modifier with Isoline Display was applied to the required objects;
There is an FBX file (if necessary, apply the Turn To Poly modifier to the FBX file);
For Corona render, it is recommended to install version no lower than 1.5, since the glossiness of materials is configured taking into account PBR.