Which is why I tend to prefer tiles for any VTT rather than big ole JPEG's. Not only will they (at least with MapTool) use up less memory if done well, they won't give anything away since you might see the walls and floor 'parts', but you still don't know how they fit together. Kind of like a 5000 piece jigsaw puzzle with no reference image(oh.. and all the sides are square, so you can't even start the outline with any sense of sureness....)
hmm.. did I say how much I like tiles???
My Finished Maps
Works in Progress(or abandoned tests)
My Tutorials:
Explanation of Layer Masks in GIMP
How to create ISO Mountains in GIMP/PS using the Smudge tool
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Unless otherwise stated by me in the post, all work is licensed under a Creative Commons Attribution-Noncommercial 3.0 United States License.