The Turbosmooth modifier was applied to the object during rendering (the geometry is anti-aliased). Adjust the smoothing level as needed.

Poly: 224,997
Verts: 227,416

Dimensions:
13.5 x 16.8 x 3.4 m

Renders for the preview were made in Corona Render 12.
On the Corona Legacy Mtl.
For Corona render, it is recommended to install version no lower than 1.5, since the glossiness of materials is configured taking PBR into account.

Textures and materials have logical names