Hey there, it has been a while

I think everyone knows what I mean. A simple circular minimap showing the current environment and some icons of interesting places.

An example:



I ran into the problem that 3d gamestudio doesn't seem to support circular windows on panels.

My question is, how do I achieve something like that? I want a circular cut-out of a rectangle map image on screen which moves accordingly to my character. I'm not asking for the math equation, but if you answer this question accidentally I won't complain =)

Does anyone have any ideas? Panels and Windows, alpha transparency, shaders, anything?

Thanks for your replies in advance
and
Cheers

Dekurian