Ever tried to import a sculpt map generated by sculptypaint into rokuro pro? it can be loaded but the vertices in rokuro, tokoroten and mage tab are all messed up.
the reason for this is these two softwares store x, y, z components of the vertices into r, g, b layers in different order. you need to shuffle the rgb layers to make slupt map generated by sculptypaint compatible for rokuro pro.
by converting the rgb into gbr you should be able to make sculptypaint generated sculpt map compatible for rokuro pro. you can do this by IrfanView. its a freeware. with this software you can also convert tga file (generated by rokuro pro) into png file (to import it into sculptypaint). you can use that png as it is and load it into sculpty paint or you can suffle the rgb layers (rgb to brg) to match the axes.
ok, now, from rokuro pro to ac3d. you can load .obj file generated by rokuro pro into ac3d, but you'll see that each vertex is connected with the neighboring vertices. this is due to the lack of "texture coordinates" in the .obj file generated by rokuro pro. if you dont want that what you can do is.... save your work into tga format, convert it to png, load it onto sculptypaint, save as .obj, then import the obj in ac3d.
i hope this will other armature sculptors like me out there.