Scythe is a Physics Editor, you can make a scenery and apply physics to it, but make the scenery is very complicated and takes to much time, so my work is create a plugin the exports the scene made in sweet home 3d (make a scene is really easy in it) to scythe (i save each object of the scene in one obj file, and i build a xml file that build the scene in sycthe )but i have been having troubles writing the xml file because the scale of the two application is not the same