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I developed a small and simple 3D games minecraft style. I would add a "MiniMap". Until here everything is fine. I had the idea to load the entire map in the background, and then I added the edge of the minimap over. So I can move the map when the player moves. My problem is that I do not know how to make hidden anything above the minimap. Have you any idea?

I'm stuck in my development

Here is a schematic of what I would do with my minimap. And hide all that is striped in red, outside the minimap.

Thank a looooot ;-) enter image description here

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All you need is texture masking. There is more information about that in this answer:

Best way to mask 2D sprites in XNA?

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