Arita rug by Scott Group

https://trade.scottgroupstudio.com/products/architecture-and-design/802377 

The model uses Displacement to create unevenness on the edge. For better display, it is recommended to set Displacement in Render Setup: Performance tab - Displacement - Screen Size (px): 1-2

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.