Most of the colony, apart from the main entrance used by the marines, was constructed in scale miniature form. The set was about long to accommodate the sixth-scale APC replica. The set was so large it had to be laid out diagonally across the stage, and forced perspective was used to add in buildings that would otherwise not fit. Cobb used a stylized design for the colony, resembling a western frontier town. It features a makeshift construction from cargo containers, broken filming equipment, and beer crates. The alien nest scene was one of the earliest filmed; Weaver's participation was delayed by three weeks because of production issues on her previous film "Half Moon Street" (1986), and the scene was one of the few not involving her. The Acton Power Station location was filled with decaying asbestos and three weeks were spent having it professionally cleaned. During this time, the alien hive was fabricated in clay from which hundreds of fiberglass and vacuum formed castings were made and installed at the station over a further three weeks. Cameron wanted to vertically pan as the marines enter the hive, but disguising the area above the marines would be time-intensive. A hanging miniature was made about square from plywood and styrofoam, hung just above the actors' heads and carefully blended into the larger set. After Remar was replaced, Cameron wanted to reshoot the scene but the miniature had been destroyed; Cameron was able to edit the scene to conceal Remar.