Minimap with community edition

It seems reading from post that a quick and effective way of creating a minimap is to put a camera above you and use its output. You can use layers so it picks out only things you want.

My question is though, can you use this technique in the community edition?

ie wouldnt that require Render-to-texture effect?

You can make a square minimap using Camera.pixelRect. However, you would probably be better served to use a still image, which you can scale and pan as you wish, painting extra elements on top of it using the GUI, unless it is really important to have real-time pictures in the minimap (in my experience, doing it this way is kind of expensive, even if you force it to use the vertex-lit rendering path for that camera)