Sure, provided it's a diorama... What I mean by that is, if it's just a model on a landscaped base, not doing anything, then it doesn't really fall into the diorama category. If say, "Kraut Killer" is depicted during the scene where it's run out of gas and Sully gets knocked on his duff by the GI, or the "When are they gonna let us fight?" scene, or perhaps the opening scene of "Sahara" when Sergeant Gunn, Hoyle, and Waco are desparately tryin' to get "this cement-mixer running" during the artillery barrage then, yeah...