 Since it was necessary for the art department 's interior sets to conform to the effects department 's exterior plans , each team closely monitored the other 's work . According to Sylvia Anderson , Bell 's challenge was to produce complex interiors on a limited budget while resisting the effects department 's push for " more extravagant " design . This task was complicated by the unnatural proportions of the puppets : Bell struggled to decide whether the sets should be built to a scale proportionate to their bodies or their oversized heads and hands . He used the example of FAB 1 to illustrate the problem : " As soon as we positioned [ the puppets ] standing alongside [ the model ] , they looked ridiculous , as the car <unk> over them . " He ultimately adopted a " mix @-@ and @-@ match " approach , in which smaller items , such as <unk> , were scaled to their hands and furniture to their bodies . 
