Here are some usage instructions for this shader pack. If you have any extra questions (which I doubt), you can find me in the HauntedPS1 Discord server as the user with the name "Analog Feelings".
Apply the shader as a material override for any mesh instance.
You can then tweak the parameters by opening the "Shader Parameters" dropdown menu.
Apply it as a shader material to a viewport container with a viewport as a child. Make sure that the scene's camera is a child of the viewport, or a child of a child of the viewport.
Follow the same procedure as the Dithering shader. Best results if the dithering shader is applied AFTER the fade.
The alpha
parameter controls the progress of the fade out/in. A value of 0 means no fade, and a value of 255 means total darkness.