Editing bitmap images using only Blueprints?

Hi, is it possible to edit pixels on an image bitmap using only Blueprints?

I can’t use C++ because I am using the Ark Modding Kit (a modified version of UE4.5) that only allows modders to use Blueprints.

So does anyone know of a way to edit a bitmap or a texture ate pixel level? Essentially I want ot make a 2d image of a map, and alter it as things happen in the game and then show the image to the player.