I hope you don't mind but while I was favouring this I noticed a comment asking about Photoshop 'watercolor' technique. I've replied with a sort of mini-tutorial featuring work far more simplistically processed and less 'artful' than your own. Would you please visit our 'SF/Fantasy' gallery aegiandyad.deviantart.com/gall… and let me know what you think?
OK.... this is a 'watercolor' done by 'photobashing' in Photoshop CS5, although I'm sure earlier version do have this filter. But it isn't enough to use it alone. Before implementing it, re-expose the picture from 'vibrant' to pale. Reduce contrast by increasing 'gamma' [third slider down under 'exposure' under 'adjustments'] by 40 - 50 points. Increase saturation a bit. Maybe turn down the 'offset' [2nd slider down under 'exposure'] to -0.0020 or so (first 'click' leftwards), then choose the best quality 'watercolor' filter settings on offer. After that, play with RGB levels, re-expose, increase or decrease saturation, use angled strokes with accented edges, sandstone or canvas texturing, anything that might drive it towards looking like a piece of fine art. It is possible to make things like these [in stereo 3-D!] , or this , or even this . The 'Turner watercolour' knock off referred to in the notes to that last one is this: , obviously from his early topographic period; done using a lowish quality, low contrast setting on the 'poster edges' filter under 'artistic' in PS CS5.