This is a little rough I was doing for a cake idea. Last night I eventually got it started. I have been wating to show a work in progress but I scanned this in a little late it does not quite show how I start. I use yellow orcha to help me make the first decisions, I then use a slight variations to the printing primaries to build up the colour. This means I can do all the colour mixing on the paper.
To finish of I use a purple to try and define some of the shadows and detail not there yet. In the cake in progress I am still building up the colour. Not sure I should of put the pink wash on the layer third from top, but still I will see how it goes.