Ultimate Doom intermission screen: How much can I customize?

[ViolentBeetle]

I am currently in planning stages for an Ultimate Doom project. I'd like to know what are my options to change intermission screen.

From what I figured, I can't move those buildings around, right? Only replace sprites.

 

I also know about UMAPINFO supporting entire custom art, which is great, but I want to know what are my options outside of that.

[Revae]

You can't move the arrow or splat in vanilla, so if you're making a replacement map the locations have to be in the same place.

[Harpax]

You're talking about the e1 intermission screen right? You can move around the buildings by altering their offsets and you can replace the individual animated graphics with anything you want. You can even use this to make custom 3 frame animated backgrounds for e1 and 3. I think rekkr did this for example.

 

As far as I can tell Umapinfo doesn't even support custom animated backgrounds which seems like a pretty significant omission. so that would be one benefit of keeping it vanilla.

[ViolentBeetle]

But I doubt I would be able to move "You are here" arrow and the slat sprite, right?