In AMPS judging, Vignette and Diorama are the same category, that's what made it so odd when my judging sheet said; "moved to vignettes".

I always build vignettes IMO. One vehicle, one figure, mounted with groundwork. It's like a portrait in some ways.

To me, that same vehicle, with that same groundwork, with a crew of guys loading ammo/supplies etc. would make it a diorama as now it tells a story versus not just a guy posing for a photo.

I think the main reason there are always going to be such blurred lines is because each person can and will interpret what they are looking at differently. A cowboy standing next to his horse, posing for a photo would easily be a vignette but if you place that horse in a hard gallop, with the cowboy mounted, facing behind him and shooting, it is still only one figure ...but it is clearly telling a story.

I think this is why vignette and diorama are grouped together in AMPS judging, although that one judge didn't get that memo that day.