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

Polys: 26969
Verts: 27049

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

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