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==Types==
===CRT -Geom===
{{Main|CRT Geom}}
*[https://github.com/libretro/common-shaders/blob/master/crt/crt-geom.cg crt-flatgeom.cg ]*[https://github.com/libretro/common-shaders/blob/master/crt/crt-cgwg-geomfast.cg crt-cgwg-flatfast.cg]
Simulates an apperture aperture grilledisplay (with the dot mask enabled). Very versatile and modablemodifiable. One of the more first popular CRT shaders. Visit the main articlefor more details.
===CRT-Calagari===*[https://github.com/libretro/common-shaders/blob/master/crt/crt-caligari.cg crt-calagari.cg] An older CRT shader similar to CRT-Geom but uses different methods to achieve its effects. ===CRT-Easymode===*[https://github.com/libretro/common-shaders/blob/master/crt/crt-hyllianeasymode.cgcrt-easymode.cg] A flat CRT shader whose settings are easier to understand. Similar to CRT-Geom in its effects. ===CRT-Hyllian===
*[https://github.com/libretro/common-shaders/blob/master/crt/crt-hyllian.cg crt-hyllian.cg]
*[https://github.com/libretro/common-shaders/blob/master/crt/crt-hyllian-lq.cg crt-hyllian-lq.cg]
Aims only for picture quality, so it avoids things that degrades the image just for accuracy. It however uses far less power to run, so it is possible to run this shader on lower end systems than CRT -Geom.
Another version, crt-hyllian-lq.cg is specifically aimed at even lower end systems.
===CRT-Lottes===
*[https://github.com/libretro/common-shaders/blob/master/crt/crt-lottes.cg crt-lottes.cg]
A newer CRT shader that uses a horizontal shadow mask pattern with blooming. The horizontal pattern works quite well at current resolutions, though it isn't entirely accurate to a true vertical slot mask pattern.
===GTU===
===Shadow Mask Phosphor Emulation===
Hypothetical shadow mask phosphor shaders such as PhosphorLUT and CRT-Royale are being developed. Due to the nature of the shadow mask screen, 4K resolution is likely needed to avoid significant downsampling of the phosphors.
==Links==
[http://board.byuu.net/viewtopic.php?f=10&t=147&sid=e4abcf3640742689dd12243052c3ab86 board.byuu.net] - Archived forum thread where much of the early CRT shader development happened.
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[[Category:Shaders/Filters]]
