Model isn't displayed correctly

Hello everybody.
So, I have this model that I want to use, it appears perfectly fine in Max/Maya/Blender, but when I add it into Unity, it isn’t rendered correctly.
Can someone please tell me how to fix it?

Here you can see how it looks:

The problem is just with the wings or also with the appearance of it? I’ll update this answer if you’d like to know more.

Probably wings are rendered incorrectly because you have some problems with normals as they are being turned inside object rather then to be facing outside, so their polys not rendered. In Max you can just flip normals for those polys. Just google how to do this.

The appearance of your model depends on material which you are applying to it. Material contains textures and shaders and they work a little different from what you have in 3DS Max for example. You can’t just import everything from Max. If you want some reflections or bump-mapping and all that cool stuff you have to use shaders, which are special programs.