Will be open sourced eventually, or early if people really want it. This is loosely following the base idea of a different cell shader on dev forum, I completely rewrote the code in my style, changed the script size to only 98 lines of code, used 1 screen gui, and 1 viewport.
Here's the original post that this is based on - https://devforum.roblox.com/t/cel-sha...