The most shocking thing after I started to create game assets is a huge part of the features of 3Ds Max and Maya are not supported in fbx export. And the only way to export a 3D model into a game engine is exporting the model as a fbx file. Static models like a building, a tree or a car etc. can be easily exported with materials. I had no problem with that. But other than “Skin“, “Physique” and “morpher“, wont be seen in the game engine. So you must do all the animations with bones and morpher targets.
And the other important thing is you should always “collapse all” by right clicking the modifier list just before exporting. Because for example if you want to export a model with turbo smooth, if you dont collapse the modifiers, turbosmooth wont be exported.