Office chair Tingle-2 from Divan.ru

Corona 6, Vray 6.
The file contains one chair and 6 materials on spheres.
Colors as in the penultimate render.
All colors can be easily changed to any via Color.

The object has a Turbosmooth modifier for easier work in the viewport (in viewport-0 iteration, in render-1 iteration).
In OBJ, Turbosmooth is applied and collapsed.

(Polys 6831) without the Turbosmooth modifier, shown on the mesh.
Pivot, XForm, UV mapping are set.
The scene is in mm.

https://www.divan.ru/product/ofisnoe-kreslo-tingl-2-rogojka-olivkovyj-chernyj