Blender - How to show transparent Alpha shadows - Blender render engine - YouTube
Basic Alpha Transparency – Blender Knowledgebase
Cycles: "Image as plane" show shadow from other objects - Blender Stack Exchange
How to use alpha transparent textures in Blender - Artisticrender.com
Blender: How to remove white border on transparent PNG
Why are Images Imported as Planes Hidden by a Reference or Background Image? - Blender Stack Exchange
Blender: How to add Transparent Images as Planes
Ex Nihilo Digital | Ex Nihilo Digital | Blender 3D Tutorials
blender internal render engine - How to cast the shadow of the texture's alpha channel and not the actual geometry of the plane? - Blender Stack Exchange
modeling - How to make a simple plane slightly transparent? - Blender Stack Exchange
Eevee shadows - Lighting and Rendering - Blender Artists Community
Transparent Materials in Cycles – Blender Knowledgebase
Better Shadow Plane and Compositing setup - Compositing and Post Processing - Blender Artists Community