Add CRT-Guest-NTSC

[johnnovak]

Description

This is a port of the ReShade port of Guest's NTSC CRT shader, with extra adjustments for Duckstation.

All major features work correctly but some minor issues may still remain. Nevertheless, it's already very usable in its current form.

Things that I've done:

• The shader is now native resolution based
• Native height triggered fake interlace/hi-res mode works (interlacing should be disabled as the emulator level, so feed it progressive input)
• The scaling of all effects (vignette, border, blur, etc.) now work mostly correctly with all window/viewport sizes and scaling modes (the screen curvature is a little bit off when varying the window size... oh well 🤷🏻)
• Organised shader params into categories and converted enums to drop-downs
• Reformatted the code so it's closer to Guest's original code (the ReShade conversion had all formatting and most whitespaces removed for some bizarre reason...)

Screenshots

The shader emulates the temporal artifacts of the NTSC signal very well, so the screenshots don't really look like the real thing in action, but here we go (e.g., the yellow-blue vertical interference pattern is not nearly as strong because it's constantly modulated at 60 Hz).

The shader is intended to be used with native rendering. Nearest-neighbour integer scaling works best, but all scaling methods are supported.

Raw image

Default preset

My personal preset

For maximum composite murkiness 😎 🤘🏻

More screenies