DL,
I tried some different ones to see what the effect would be. I came up with about the same thing on every one. I think that the problem for me stems from the fact that I run @ 1600x1200. By the time I get any of them down to what I would consider "button" size, they are so small that you loose the detail that makes them instantly recgonizable as portholes. You might be able to do something with one more towards small window size and keep the effect though.
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