Question: AC3D is a 3D design program which has been available since which year, 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 X-Plane flight simulator produced by Laminar Research, and also ships with other software to build and customize aircraft and scenery?
Sentence (from "X-Plane (simulator)"): This is further enhanced by the Scenery Gateway which allows user to share airports with other users and eventually the airports are included by default in the base product.
Relevant evidence: No