Yes it is only for the visual effect in The Cursed.


It should not be very hard to used some existing gadgets to do some stuff that was mentioned above. These should work:

"Ground Decal Fix" by CarRepairer: it would need some modifications, but it will spawn a non blocking, invisible fakeunit that has/creates a ground decal.

"Aura" and "Attributes" by CarRepairer: you can use the fakeunit as aura-caster (healing allied units, making them faster, take less damage, ... whatever you want) with a range that correlates with the visuals.

"Tech Trees (with count, range, sign, ...)" by zwzsg: give all buildings a prerequisite that is only provided within a certain range around the fakeunit. Thus you can only build on the ground decal.

All gadgets can be found in The Cursed btw. The needed modifications should be minimal. A growing creep could be simulated by replacing the fakeunit with another one after some time.