Version of Corona - 8 (Corona Legacy Material).
The model uses materials that may not be displayed correctly in very old versions of the engine.

For proper operation, check that the units of measurement in the scene are in mm:
Customize - Units setup - System unit setup - mm
The carpet material is made using the Displacement card (make sure that Displacement is enabled in your scene settings).
4 Colors and 4 sizes of carpet in the scene:

- 120*170 cm.
- 160*230 cm.
- 200*290 cm.
- 240*340 cm.

https://www.benuta.eu/washable-rug-enzo-multicolour-60007623-31101.html 
https://www.benuta.eu/washable-rug-enzo-light-brown-60007623-30101.html 
https://www.benuta.eu/washable-rug-enzo-taupe-60007623-57101.html 
https://www.benuta.eu/washable-rug-enzo-cream-60007623-62101.html 

More carpets: http://3dsky.org/collection/shared/5321350