Difference in brightness, raw, crt-cgwg-fast and crt-consumer-arcade. Losing most dark details in crt-cgwg and similar shaders, while using this “trick” will be almost 1:1 brightness with raw.
Notice crt-cgwg loses a ton of brightness while it uses a mask that’s barely visible when crt-consumer-arcade uses a mask that is almost full strength. Because crt-cgwg uses an effect that is only subtracting while on the other hand we use “subtract-evenly add” and so on.