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: 662 753
Verts: 501 132

-max 2012 corona
-fbx (it is necessary to throw MeshSmooth (1-2 iterations) on some objects)
-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 a version of at least 1.5, since the glossiness of materials is configured