Change mini-map shape(UMG Image component with dynamic material)

Hi,

I would like to change my mini-map shape from rectangular(square) to semi-circular without loosing to much view. Do you have any ideas how to do it?

Here is my current mini-map:
Rect_miniMap.png

A transparency mask applied to the image before rendering. Change your dynamic material to Masked type and insert an opacity mask image onto the opacity node.

Thanks for help, custom-shape mini map implemented.