"Virtual" Battlemat: Advice?


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Silver Crusade

I'm hoping someone can help me with this one:

I have a laptop that I want to use as a virtual battlemat for a tabletop RPG. I'm hoping I can use the maps directly from the pdf of the adventure without having to re-draw everything on a battlemat (whiteboard).

The problem I'm facing is that I need a way to do "Fog of War". I can't just show the players the whole map at once, but I can't figure out how to reveal sections as they explore.

Just to be clear, this is for a local, real-world, everyone-in-the-same-room game. I've tried using Maptools, OpenRPG, Fantasy Grounds, ect., but they all primarily online systems, and for the life of me I can't get it to do what I want on one local laptop. I just want to load a jpg (or something), and be able to reveal it bit-by-bit as I go.

Can anyone please help me with this?


Get GIMP.
Open up your JPG in GIMP.
Add a new layer to the image.
Fill that layer with black.
Erase portions of that layer to reveal the map underneath. (Turn down the opacity on the black layer so you know what portions you're erasing.)

Most image editing programs have a "full screen" mode that lets you hide the toolbars and just display the image you need.

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