Edge highlighting

[Coldscooter]

I want to create meshes to overlay on my landscape to highlight regions when viewing from a top-down/aerial view. I’d like the meshes to have a highlighted edge to show the boundaries of the region.

Using a mesh shape like this for example:

Does anyone know how i can create a material to just highlight the edges of the mesh?

Thanks in advance.

[Nathaniel3W]

If the meshes fall away at the edge, then you could do a normal dot camera to detect where to draw the outline. You might be able to do something with scene depth similar to the UDK | DevelopmentKitGemsSobelEdgeDetection