eevee: mix holdout with transparent fails — Right-Click Select
What the heck is a Holdout Shader? [video] - Tutorials, Tips and Tricks - Blender Artists Community
shaders - Occlusion material (holdout) in Cycles - Blender Stack Exchange
Blender Tutorial - How to use the Holdout Shader - YouTube
How to use Holdouts in Eevee and Cycles — Blender Secrets
The difference between the holdout and transparency shader. I created a list containing 70+ sites with free resources for 3D artists. You can download... | By Blender Daily | Facebook
Here is a free Holdout and Emission Shader guide to help Blender users, extract from my free PDF guide and YouTube tutorial below :) : r/blender