The model is made for smoothing the stack is not collapsed.
The anti-aliasing modifier is enabled (display in the viewport – 0 iterations on the render – 1-2 iterations)

Polys: 173770
Verts: 203568

-max 2015 corona
-obj (you need to apply MeshSmooth (1-2 iterations) to some objects)
-mtl
-textures
-material library

For Corona render it is recommended to install version no lower than 1.5 since the glossiness of the materials is adjusted