Easy way of combining maps is by using layered texture. Wilt_Trans01 was made for the outline of the leaf geo.(so no need for extra detail modelling) Leaf_crack01 was a map painted for inside animatable transparency map
(Fig.06).
Fig. 06
Bottom Wilt_Trans01 is first file to be middle click drag and drop on the layered texture. Blend mode is multiply (Fig.07).
