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An alternative to James idea is to either photo or get photos from the net from above and prind and paste them down in your pond and varnish or whatever water medium you are going to use over the top.I took my photos in the Japanese garden in Holland park when I was last in London, haven't had time to actually do this so can't show any results but the ones James painted were very effective.Post your results as I would like to see what you achieve.Cheers