In my First Person game there is a flashlight and I would like to have creepy messages on the walls that can only be seen when you shine your flashlight on them. Pretty much exactly how the orange paint works in Alan Wake where you see the message in the radius of the flashlight.
There is an old dead thread about something simmilar that I think could be repurposed for a decal or sign on a wall. But I am not that familliar with materials so the solution was left a bit fill in the blanks, and the OP didn’t end up showing the full solution.
Essentially I’m wondering if someone can translate that threads solution or if there is a easier way to do this for images in 3d space?