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I'm not sure about the scale (people vs objects) and I didn't add any monsters there because I'll use roll20 for that. But the cages are supposed to be that big because there's a bunch of people in them. I found a better cage somewhere, but it wasn't transparent so I decided to go with this "goblin wood cage" instead. For a first try ever, I think I did ok. I used Gimp.

Comments and critiques welcomed