https://ru.pinterest.com/pin/406801778813734464/ 

https://www.rnrdesigngroup.com/products/ecko-wall-sculpture 

https://gambia.desertcart.com/products/34743593-arteriors-home-ecko-wall-sculpture?__cf_chl_rt_tk=pOqII1qXTZEzv4MAdOPHi8b66XZ4sW9DyOkQQsVSTC4-1778615559-1.0.1.1-N7ZQiRZl2QoC.rVBtmhTYtZJKraVy3UVSaGxwODykOQ 

Layered geometric wall sculpture features hammered open iron squares joined together with touches of dark golden brass.

The model is based on the original manufacturer dimensions.
Materials and groups are named the same, as the model.
One multi-submaterial for model for easy change or setup.
Object at 0.0.0, clean and light scene.
The archive contains the FBX, OBJ file.

The metals are blended using a mask in Corona Layered Mtl. To do this, the model is unwrapped onto the second channel without any overlaps. The resolution of the mask and normal map is 8k.
Materials and colours can be easily changed.