At present, Second Life does not allow the import of 3D Mesh (direct import of file formats .OBJ,3DS...), we have to use the models of sculpties by taking into account their constraint. If you wish to import your 3D objects created on your 3D software (Blender, Wings 3D, Maya, 3D Max...) in Second Life, vote for allowing the import of 3D Mesh in the Second Life.