So I was just wondering if it would be possible to make it so that you could create a secondary space on an already existing space that was treated like another independent portion of the map....
Ie in terms of the simplest form.
Hero traps X units in an alternate dimension. Here, everyone else looks like spectral ghosts and the ground is made up of a different terrain and everything looks weird for the units affected. All the units in this realm can interact normally with others but not with units of the other "realm". To all other units in the regular game, the units look nearly invisible and are untargetable.
I dunno if this is good enough explanation but I basically wanted to use the idea to setup stuff like digging a tunnel underground and having walking through it change everything to look like a tunnel and remove your vision of other units and stuff... Hopefully this can make a little bit of sense to somebody. It's kinda hard for me to explain...