The leaf pattern was used early in the war. It was a jagged pattern unlike the mickey mouse ears that used a round pattern along the edges. If you look at any of the drawings in Profile no 6 you can see the shaded patterns. Here's a link to an article on it:
http://bcoy1cpb.pacdat.net/mtp_46_pt_4a_painting_mt.htm
I can find lots of pix of the mouse ears but none of the leaf pattern.