+1

Asking the important question here. +1

map files I think are .ress and can be opened by Unity...just not sure what version yet

I have a bit of background with Unity and modding. As far as I can tell, adding maps is not currently possible in the game. There is no known way to signal the game that something it imports is not a unit. The technology UEBS2 uses under the hood are Unity AssetBundles. "An AssetBundle is an archive file that contains platform-specific non-code Assets (such as Models, Textures, Prefabs, Audio clips, and even entire Scenes) that Unity can load at run time." (Source: https://docs.unity3d.com/2018.4/Documentation/Manual/AssetBundlesIntro.html). So a Unity 2018.4 like UEBS2 game can theoretically be enabled to import custom maps as scenes, leading me to the conclusion:

It is not possible to import custom maps yet, but it may be made possible by the game developer at some point in the future.

Thanks for the insight smileAndWin!

Also, just bumping the thread to make sure the devs see it, because I'd really love to get my hands on some map making :-)

custom maps would be amazing. I also wish they added custom walls you can place in the maps in the unit selection screen. similar to the campaign walls possibly