Beastman's cool costume (Patreon)

Several eagle eyed dweebs pointed out Beastman's base costume was a punisher action figure. His skin was just painted orange to match the beastman figure, and we slapped some super cool fingerless gloves on there. We also opted to cut off his grenade launcher. 

For the head swap and fedora I sawed both their heads off - my original moldy old childhood beastman was sacrificed because of the missing hand. The fedora was then permanently modeled onto his head out of greenstuff with a clayshaper brush.

For the actual shots the original plan was just to blue tack his head to punisher’s body but he looked REALLY fucking stupid, like he'd lost half his body mass from the previous scene. We'd briefly considered rolling with it but it just wasn’t gonna work so it had to be shrunk after the fact in after effects.

This was achieved by shooting a pose with the head tacked on, then shooting the same pose with just the body. In AE I layered the base shot with the huge head, then a layer with a patch taken from the shot without a head motion tracked over that base shot (to cover up his head and give him a neck), and then a final copy of the base shot with beastman's body masked out, with just the head showing, so it could be shrunk to a more accurate size without showing the bigger head underneath