I am trying to make 3d direction arrows, When I make hotspot flying (which is not documented I guess) it puts the hotspot on the center. When I set ath, atv, nothing changes. There is no x,y property. Only way is changing ox, oy. However changing ox and oy cannot change hotspot's rotatation origin. When I use rotate, hotspot still rotates around the center. Plugin is not a solution since it is not possible to set rx,ry,rz properties for plugins.