How to visualize Sim City like zones on landscapes?

Development Rendering
1

Hi everyone. I am trying to implement the visualization of zones like in Sim City e.g.

Now I am struggling what the best way is to achieve something like that. Currently I have two ideas:

  1. Use decals in some way

  • Pros: Performance? Easy to match geometry.

  • Cons: Can not map on landscapes, right? Since I will probably use landscapes this approach wouldn’t work for me.

  1. Use Static Mesh Actors in a layer with corresponding colors
  • Cons: How to match the underlying geometry with this approach?

Probably there are more elegant and easier approaches that I don’t know about. Thus feel free to give me hints :smiley:

What do you think about both approaches? How to solve the stated problems the best way? Maybe using decals and modelling the floor in a non landscape way is the best way?