How to make part of an ngui sprite transparent

[TommyT31]

Hi all.

I'm trying to do a map for a game I'm doing that's based on squared. I would like to cover a pretty drawn map and reveal the squares around you. I was thinking I could use indiviudal sprites but this seems pretty inefficient if you map is like 50 x 50 squares.

There must be a way to do this but I'm not sure where to start.

Any tips or advice on what to look into ??

[ArenMook]

Create a texture, set it to point filtering, fill its data when you need to update it, and use UITexture to display it.