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

Suitable for long-range and medium-range use. It won't do for the short-range!
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)

https://schumacher.com/catalog/products/R73062 

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