My character skinned in 3dsmax looks a bit different after exporting as an open-collada format.

Skinning an avatar in 3dsmax include two categories called "Skin" and "Physics". An Open-Collada file format can only support "Skin" way perfectly, however, while exporting the avatar as Open-Collada file. If you face an issue importing Open Collada file or importing avatar including animation, please try with FBX either Alembic file format with PC2.