Pixelated shadow / outlines on object?

I’m making a horror game, I want to try to make the graphic something kinda like this

There’s this pixelated outline or shadow on the object in the picture which is the door, how would I achieve this effect? Is it a camera thing or texture?

its probably a texture

you can try highlights for a solid black outline

Probably move this to the #help-and-feedback:game-design-support for additional help.
This is the scripting support.