More carpets: https://3dsky.org/collection/shared/5253031 

The carpet model is very "light".
The units of measurement of the model are mm.
Pivot at zero coordinates.
The model uses Corona MTL materials.
Reset XForm and Prune Scene script were applied to the model.
Vray materials are made using a converter.
The model contains a displacement map.
For better quality, you need to change the parameters in the settings:
Corona - Render setup/Performance/Performance Setting/Displacement/Screen size = 1px
Vray - Render setup/Setting/Default displacement/Edge length = 1px

https://www.jotex.de/rorvik/rorvik-flachgewebeteppich/1663585-01 

For Corona Render: it is recommended to install version not lower than 1.5, since the glossiness of materials is configured taking into account PBR.

Those who work in V-Ray version lower than 3.1, be careful. In the materials in the BRDF section there is Microfaset GTR (GGX), if your version is older than 3.1, the BRDF field will be empty. Select Blinn, Phong or Ward - what is preferable for you.

If you have any questions about the model, please write to me in private messages.
Enjoy your renderings)