Custom Shaders

When I say shaders I don't mean shaders on Modrinth or Curseforge, I mean built in shaders like the end gateway or the ender dragon explosion. I want to be able to have a procedure that can generate one of those or allow us to create our own stuff like a skybox block. (If the 3D particles plugin can do end gateways, MCreator definitely can.)

P.S. I mostly want the ender dragon explosion