I handpainted almost 20 variations of birch leaves to create a semi-random brush to quickly populate branches. Most of the leaves are about 256px in height within file, so should work nicely at higher resolutions with no loss of detail.

TIPS: * Toggle watercolor edge in the brush for more painterly effect. * Use sharpen on finished piece for more realistic depiction. * Use multiple layers and adjust contrast and saturation of the bottom layers to make a layering effect of leaf stack.