Rotation Fixing for Unity - 3dsmax to Unity Export FBX
Just a little clip of how I managed to get the rotations to come in correctly into Unity 2017.3.1.
3dsmax 2016
FBX 2012
Rotated the Pivot as seen in the Video, export as FBX 2012 and Y-Up (Blue arrow pointing forwards).
Final mesh will be imported into unity with just minor floating point offsets on the rotations, nothing major.
1) Select your object (reset xformsif you have to, via the tools)
2) Go to the Heirarchy, Pivot, Affect pivot only button
3) Use Align to world to reset it
4) Rotate the pivot with angle snapping or 90 degrees forwards until the blue pivot points forwards along the ground
5) Export with Y-Up
6) Import to unity (any version)
7) -90 on X rotation is now 0