Nicefu only idea i can think of is adding a nice looking christmass tree inside the new room and some presents underneath it.
if someone wants in the map ctf-xc-snowglobe there are some usable decorations they used in their skybox. maybe use it for another christmas map if it is allowed?
i think mh-purplechristmas also is a good example of good christmass map.
could get a christmass tree from any christmass map already made if it is allowed and maybe get some better higher resolution textures.
(editor crashes everytime after rebuilding) 🙂
edit---
i made this just to gather everything i can find christmass related so maybe i or somebody else can use the assets later (have not added them all yet because i have to stop now for today. (its like a testmap/work_area you could say. (choose your tree)
mh-purplechristmas uses trepack1.wsplant as decoration for Christmas wreath, its a mesh you can duplicate and it is more realistic then masked textures. dont know about performance tthough im to much noob for that. have not added that one yet either.
edit again--
DM-(C)deCyberXmas][ from unrealarchive has a funny christmass ambient sound if anyone wants to use it and or likes it. Maybe for the new room in Liandrydocks?
Well maybe you guys have more knowledge of all the meshes of unreal tournament that could be used, i just play this since a few months.