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

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