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

Polys: 399 547
Verts: 493 638

-max 2012 corona
-obj (you need to throw MeshSmooth (1-2 iterations) on some objects)
-mtl
-textures
-material library

For Corona render, it is recommended to install a version of at least 1.5, since the glossiness of materials is configured