Requesting Clarification Regarding Use of Star Wars Assets

Hello reader,

I am hoping that an official legal distinction can be made here. I am aiming to adapt an original story by Joe Schreiber to film, possibly using UEFN and the Fortnite Star Wars assets to aid in production. I have reviewed the following two resources for rules and guidelines:

The setting for said story would be on an Imperial Star Destroyer; as the assets for the full external view and a hangar are included in the Star Wars asset pack, I surmise this is not a problem.

However, I am unsure on the specific guidelines surrounding use of characters. Since the story features a zombie-like virus, the flim would include zombified characters. Can a filmmaker for example edit the UFEN model “Imperial Stormtrooper” asset in-engine to depict missing limbs, discoloration, disfiguration, etc. ? If such modifications cannot be made in UEFN to the model directly, do content guidelines extend to post-processing modification/ VFX of those assets in footage captured within UEFN and used on third-party software?

What depictions can or cannot be shown? Can blood be depicted, or corpses? Ballistic mode sets precedent for not including the “blue pixel cube” despawn animation and leaving bodies. Could a red version of these pixel cubes be used to represent damage or decay? Can stormtroopers be mixed with existing zombie or zombie-adjacent characters for film use? What bodily injuries, if any, can be shown (scratching, breaking, etc.)? Is implication separate from explicit depiction?

This would all be operating under a nonprofit, unmonetized fan use scope.

Thanks.