Well, i tried a loot to export my rigged meshes from 3dmax 2015 and aways wen i try to upload my mesh, i cant import the riggs but only the mesh, i tried puglins, export to other formact (like .FBX) and convert to .DAE but this never works. I tried this tutorial http://wiki.secondlife.com/wiki/Mesh/Exporting_a_mesh_from_3ds_Max but dont work too, is 3dsmax 2015 compatible do export rigged collada files to sl?