There is an option in .FBX to triangulate on export. That was the giveaway....... ;) .FBX to UE4 respects 3dsMax's modifiers but not Blender's, it seems.
Lowpoly Mako shark modeled, sculpted, rigged and skinned by me Used Zbrush,3dsMax,Roadkill,Photoshop and The Xoliul Shader Tris: 1706 Comments and critics more than welcome :]