Recommended · for some experience
DIY LED Video Wall made in 24 hours
Why people recommend it
Bitluni's LED wall build is pointed to as a project to follow for a large RGB matrix, including using ping pong balls as diffusers.
Watch for: At least one follower hit problems reproducing the build
In their words
It is very important to note that I am following BitLuni's video on this, following it using almost the same parts, and most definitely the same code (I put it below)
Micah Wagoner on arduino.stackexchange.com, Oct 2019. CC BY-SA.