AC3D is a 3D design program which has been available since 1994. The software is used by designers for modeling 3D graphics for games and simulations - most notably it is used by the scenery creators at Laminar Research on the X-Plane (simulator)
Initially developed on the Amiga, the code was then ported to Silicon Graphics workstations which used the GL graphics library. At that time, the user interface was implemented using X-Window/Motif. A Linux port was released onto the internet in 1994 (the GL graphics were replaced with OpenGL). A windows port followed when the X-Window interface was dropped in favor of the portable Tcl/Tk scripting library.
