This is a series of stained glass windows for Ubisofts' Heroes of Might & Magic VII (if you're interested to know how these are put together there's a step-by-step further down the page)
This is a quick example of the process for each glass, starting with a colour-rough sketch, (all stages done in Photoshop)...
...then smoothing out the colours, I use some texturing and smudging to give that glassy look, with an eye to shapes, and how curves and points of the shapes would be best tackled as if this was real glass and lead trim to work with...
the leadwork is simulated with another layer of black lines, going around all the obvious shapes where natural differences occur, - I would definitely recommend the plugin Lazy Nezumi to even out the crinkles in wacom drawing, so much better results.
The final result