when you bring 2d into your 3d
be it images, greenscreen footage, text or grease pencil,
there are methods for making it face the camera.

these are those.

00:00 Intro
01:03 Sidebar : Use Images as Planes
01:39 Copy Rotation
02:17 Sidebar : Pixel Art Textures
03:36 If it’s Grease Pencil
05:52 Sidebar : Multiple Cameras
06:42 Drivers for multiple cameras
11:37 Geometry nodes and Particles
16:29 Speech Bubbles – Always the same size!
20:08 Equarectangular projection