The game normally draws ore patches in map view with a checkerboard pattern. This mod changes that so that they are a solid color.

If you add this to an existing game, your map will not update immediately until you walk near the ore, because Factorio optimizes drawing the map. If you want to regenerate the map immediately, run this console command (this might make the game momentarily freeze as it is an intensive computation)

/c game.player.force.rechart()