add volume to flat walls!

Product links:

https://www.westelm.com/products/geometric-ceramic-tile-art-w2738/ 
https://pikeandrose.com/instore/product/geometric-ceramic-tile-dimensional-art-west-elm-westelm-ef3033?model=0 

The model is made for anti-aliasing. In the scene on the Turbosmooth modifier 0 iterations, during rendering: 1. Pivot in the center of the panel at the point of attachment to the wall.

V-Ray version: 3.5. Those working 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, then the BRDF field will be empty. Choose Blinn, Phong or Ward - what is preferable for you.

Corona version: 5. For Corona render, it is recommended to install version no lower than 1.5, since the glossiness of materials is configured taking into account PBR.