transparency - How to cast shadow onto image planes with alpha? - Blender Stack Exchange
Blender: How to remove white border on transparent PNG
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
Eevee shadows - Lighting and Rendering - Blender Artists Community
Basic Alpha Transparency – Blender Knowledgebase
How to import image as plane with transparent in Blender - cgian.com
UPDATE] Smooth fur - Bring these features back to Eevee from Blender Internal — Right-Click Select
Cycles: "Image as plane" show shadow from other objects - Blender Stack Exchange
Change the color of shadow on transparent plane - Lighting and Rendering - Blender Artists Community
importing transparent image as plane doesn't render very well - Materials and Textures - Blender Artists Community
Transparent Materials in Cycles – Blender Knowledgebase
How To Render Transparent PNG Images In Blender's Cycles And EEVEE Render Engines | Gachoki Studios
How To Add An Image Sequence As A Plane Object? – blender base camp