Leaf Shader for Cycles by xaotherion on DeviantArt
Tutorial: The Natural Substance (Realistic Plant Material) - BlenderNation
Procreate leaf brushes + blender by flareeee on DeviantArt
Stylized Tree Shader Tutorial — aVersion of Reality
Blender Tutorial: How to create Realistic Ivy with BlenderKit presets | In this video, You can learn how to use Ivy generator add-on with Blender 2.8, and how to improve the results