Create a pattern on the clothing
I draw the line-art on a new layer first, and then set the mode to Multiply. I prefer to use a very fine Hard Round brush, between 3 and 5 in size, for this stage. Then I block the colours underneath the line layer. After the design of the drawing is finished I wrap it to match the figure’s curves, so it looks as though she’s wearing the dress, rather than being covered by patterns that have simply been pasted on top of her.