|Title: Death Star Trench.|
Models used: Star Wars: Imperial Assault by Fantasy Flight Games.
By: Alberto Sánchez Vélez (Dr. Metalurgico).
Web site: You can view many more photos of this and his other projects here.
To the left you can see photos of the main molds he made by assembling various Hirst Arts sci-fi pieces plus a few others (I think I see a grate door from an Egyptian mold in there).
Then he was able to cast large sections to quicky cover his gaming table.