Editing Shader Presets

{{WIP}}
Shader Presets are combinations of one or more shaders. The Shader Chain which is a stack of shader passes each one pointing to a specific shader file.<ref>[https://docs.libretro.com/guides/shaders/#shader-presets Libretro docs: Shaders]</ref> There is a misconception about shaders; Generally, you really can't copy+paste shaders between two different programs even if they support same extension like .glsl, not unless they know how their shaders are structured and what kind of input they need and output they give.<ref>[https://forums.dolphin-emu.org/Thread-possible-to-create-a-ntsc-s-video-shader-for-dolphin?pid=450879#pid450879 Shonumi's comment about shader extensions and using with different programs]</ref>

;Before diving in;
;*Some of the [[Shader Presets]] mentioned below include [[shaders and filters]] that are already available as enhancement/adjustment option in your [https://www.pcgamingwiki.com/wiki/Category:Graphics_Adaptor GPU driver control panel]  or from your digital [[displays|display]] OSD. Some of those things may cause color clipping, exposure issues (due to using excessive digital adjustments to image) and [[Input lag]]. It's recommended to avoid usage of color or excessive image options/filters. You can use RTX Dynamic Vibrance option to avoid color crashing which comes with the new Nvidia App[https://www.nvidia.com/en-us/software/nvidia-app/], or if it's possible use a HDR device with [[High_dynamic_range#Inverse_tone_mapping|Inverse tone mapping]]. Also you can use [[Displays|analog device/CRT]]'s OSD adjustments.

==RetroArch/Libretro==
RetroArch is able to stack shaders to create a combined effect. These complex effects are saved with a special extension:

    .cp'''g''' for '''CG'''
    .glsl'''p''' for '''GLSL'''
    .slang'''p''' for '''Slang'''

The shader presets can also have '''parameters'''. This means that you can tweak them to fit your needs.

===[https://forums.libretro.com/t/sonkun-s-crt-guest-advanced-slot-mask-presets-thread/39091 Sonkun’s crt-guest-advanced-hd presets]===
[[File:Sonkun megadrive.jpeg|thumb|298px|ntsc preset Megadrive version]]
A mix of basic crt attributes that invokes a nostalgic vibe with a modern twist, based on [https://forums.libretro.com/t/new-crt-shader-from-guest-crt-guest-advanced-updates/25444 @guest.r’s crt advanced hd and ntsc shader] combined with a variation of [https://forums.libretro.com/t/dogways-grading-shader-slang/27148/442 @Dogway’s grade shader].

3 shader preset folders for 3 monitor types: 1080p, 1440p and 4k so whichever monitor you have, you can choose the right shader resolution for your monitor type. These presets were designed to be used on these three resolution types only. Not OLED, 720p or other random resolutions, if you use it on any type of display besides those 3 standard displays [http://forums.libretro.com/u/sonkun Sonkun] may not be able to help if you run into any issues. If they end up looking ok to you on your display regardless then game on. 64 shader presets to choose from per folder with 3 different phosphor types for USA, Japan and PAL that come in both color temp and multiple cable types to choose from included (representing 4 cable types to choose from: rf, composite, s-video and rgb and 3 composite types to choose from: standard, artifacts and Megadrive rainbow. Also S-Video presets includes [https://github.com/Hyllian Hyllian]’s “sgenpt-mix multpass” shader to take care of checkerboard dithering and lite vertical line dithering)

Recommended to use with these shaders is rf/composite for all systems from the 4th generation consoles and below (nes, snes, genesis, atari, turbografx etc.), s-video for 5th and 6th generation consoles (ps1, saturn, n64, dreamcast, ps2, gamecube) and rgb for arcade. Also for NES cores Sonkun recommend changing the Palette setting. The two most popular cores are mesen and nestopia. For Mesen you should use the “Original Hardware (by FirebrandX)” setting, for Nestopia use the “NTSC hardware FBx” setting as Sonkun composite presets were designed with those pallets settings. Also with Mesen you should change both the top and bottom overscan settings to 8px to avoid harsh moire patterns on the screen. For Nintendo 64 mupen64plus-next core with Parallel-rdp settings enabled Sonkun also recommend changing the “crop overscan” setting to 8 to help reduce moire patterns that appear on the screen with that setting at default 0.

===[https://forums.libretro.com/t/mega-bezel-reflection-shader-feedback-and-updates/25512 HSM's Mega Bezel]===
[[File:HSM's mega bezel - intro.gif|thumb|298px|HSM's mega bezel intro animation (Can be customized and turned off)]]

The Mega Bezel Project started back in July 2019 when developer [http://forums.libretro.com/u/HyperspaceMadness HyperspaceMadness] was looking at experimental shaders creating real-time reflections on emulated display bezels. More than two years later, the swiss-army-knife of visual simulation to enhance the retro game experience is ready for players.<ref>[https://www.libretro.com/index.php/retroarch-introducing-the-mega-bezel/ RetroArch – Introducing the Mega Bezel Reflection Shader]</ref>

<small>
<div style="height:18em; width:500px; overflow:auto; border:2px solid black;">
{| class="wikitable" style="text-align:center;"
|-
|
*    Auto-Generated Bezel around the tube area
*    Dynamic Reflections on the Bezel
*    Images can be added for background, LEDs, PVMs etc.
*    Easily scale the game screen, including integer scale
*    Crop edges of the the game image
*    Dual screen support for emulated systems like Nintendo 3DS (Emulated by Citra) or Nintendo DS (NDS)
*    And lots more
*    Also Runs on Xbox Series S, Xbox Series X and Steam Deck
|}
</div>
</small>

====Other notable presets for HSM project====
These presets are tested and developed for use in conjunction with the HSM's Mega Bezel.
[[File:Duimon's NGP-NGPC preset.jpeg|thumb|298px|Duimon's Neo Geo Pocket/Color preset]]
*[https://forums.libretro.com/t/cyberlab-mega-bezel-death-to-pixels-shader-preset-pack/35606/1 CyberLab Mega Bezel Death To Pixels] ('''Includes HDR supported "Megatron 4K HDR presets" [[#External_Links|which is heavily recommended]] if you have a HDR supported 4K display.''')
*[https://forums.libretro.com/t/thenamec-mega-bezel-packs-amiga-commodore-64-vic20-crtgaming-soon/31523 TheNamec Mega Bezel Packs Amiga, Commodore 64, VIC20, CRTgaming]
*[https://github.com/Duimon/Duimon-Mega-Bezel#installation-using-the-release-zip Duimon Mega Bezel Graphics]
*[https://forums.libretro.com/t/zombs-mega-bezel-pack/39519 Zomb's Mega Bezel Pack]
*[https://forums.libretro.com/t/soqueroeu-mega-bezel-tv-backgrounds/34301 SOQUEREU's Mega Bezel TV]
*[https://forums.libretro.com/t/p3st-s-overlays-for-mega-bezel-shader-arcade-tv-s-and-more/39263 P3st´s Overlays for Mega Bezel]

===[https://forums.libretro.com/t/sony-megatron-colour-video-monitor/36109 Sony Megatron (HDR)]===
These presets/shaders are intended to rely heavily on the [https://www.rtings.com/monitor/tests/picture-quality/peak-brightness#our-tests luminance performance] of your display rather than the performance of your graphics card. As such you will need a bright display preferably DisplayHDR 600 but some SDR screens do get bright enough in particular laptop screens. A DisplayHDR 1000 display will really have the head room to cope with some of the hgher end PVM’s etc.

===[https://github.com/RetroCrisis/Retro-Crisis-GDV-NTSC Retro-Crisis-GDV-NTSC]===
It is based on Guest Advanced NTSC shader, which is authored by Guest R. All the presets were configured in sRGB at 4K display resolution on a 20" screen. Presets could potentially look worse on larger screens in some instances.

[[File:Koko-aio-monitor-Commodore 1084S-Night.jpeg|thumb|298px|Koko-aio's Commodore 1084S monitor (Night)]]

===[https://forums.libretro.com/t/koko-aio-shader-discussions-and-updates/38455 Koko-aio]===
One of the main goal of this one is to be usable on integrated GPUs. Granted, don’t expect it to run on a Raspberry pi, but the actual target is Intel Haswell, the one on which [http://forums.libretro.com/u/kokoko3k kokoko3k] develop it, where it perform with all the features enabled, when dealing with 240p content, on 1080p at resolution ad about 85/90fps.

Koko-aio is meant to be an all-in one package. It can be configured with many parameters, so that can be scaled to run on even on modest gpus while still developed to run with heavier presets on at least Haswell+ iGPUs (as in version 3.5, it reaches about 85fps with all features enabled When dealing with lowres content on 1920x1080 resolution). While it is not meant to simulate the internal behaviour of CRT displays, it aims to give users "visual" parameters to make their monitors look similar.

<small>
<div style="height:25em; width:500px; overflow:auto; border:2px solid black;">
{| class="wikitable" style="text-align:center;"
! scope="col"|Features
|-
|
* Scanlines
* Screenlines
* RGB phosphors
* RGB deconvergence
* NTSC/PAL CVBS color bleeding
* Aperture grille and slot mask.
* Input signal glowing
* Output signal glowing
* Blooming
* Gamma, contrast, saturation, luminance, color temperature adjustments
* Black frame insertions through alternate blanking
* Interlace flickering, forcing and emulation
* Antialiasing
* Curvature
* Ambient lights
* Vignette and Spotlight
* Bezel (Thanks to [https://github.com/HyperspaceMadness/ HyperspaceMadness])
* Background images
* Full screen glowing
* 3D rotation/tilt
* Integer scaling
* Background image Night mode
* Support for backdrop images for BW game/CABs that use mirrors
* NTSC emulation with selective artifacts smoothing
* Temporal bloom
* RF Noise
* Dot matrix display emulation with grid, shadow and motion blur (gameboy mono)
* Monochrome display “colorization”
* TATE mode
|}
</div>
</small>

===[https://github.com/estefan3112/koko-aio-slang Koko-aio fork for Arcade Artwork]===
[[File:Estefan3112's Koko-aio fork for Arcade Artworks.png|thumb|298px|Koko-aio fork for Arcade Artwork with HDR]]
Repository for game-specific Arcade Artworks by using the [[#Koko-aio|Koko-aio]] slang presets.

Successfully tested under MacOS, Windows and iPadOS. Currently the [[#Koko-aio|Koko-aio]] presets provides superior performance on all reasonably powered desktops (including Macs), while providing enhanced shader functions, including bezel reflections, halo/glow effects and many more. It embeds game-specific artwork seamlessly and scales according to resolution. The [[#Koko-aio|koko-aio]] presets is currently under steady development, thus it is a clear aim to stay in line with the upstream changes.

Main source of this artwork comes from John Merrit, who set a benchmark for realistic arcade artwork. Version 0.2 and following releases see the inclusion of some breathtaking 4K artwork provided by Ars Invictus as well. Release 0.3 contains 52 new game-specific presets. With release 0.4 (WIP), [https://github.com/estefan3112 estefan3112] would like to nightify all presets to the extent required. 0.4 release will also see usage of the new ambilight functionalities. See the list of new game presets in the each [https://github.com/estefan3112/koko-aio-slang/releases release notes].

===Overlay/Bezel packages===
These overlay/bezel packs shouldn't be confused with shader presets above. Most of these packs only comes with overlay and config files (.cfg and .png files) for 'RetroArch/config/mame or FinalBurn Neo' and 'RetroArch/overlays/arcade' directories.

*[https://forums.launchbox-app.com/profile/88501-mr-retrolust/content/?type=downloads_file&change_section=1 Mr. RetroLust's Lights Off]
*[https://forums.libretro.com/t/4k-vertical-overlay-community-contributions/25247 ArsInvictus 4K Vertical Overlays]
*[https://retropie.org.uk/forum/topic/24427/my-realistic-arcade-overlays-for-retroarch-collection Orionsangel's Realistic Arcade Overlays]
::<small>[https://www.youtube.com/watch?v=kxalOc78xws Most of Orionsangel's bezels in one large pack (link in the description)]</small>

==[https://forums.libretro.com/t/back-ups-arcade/40172 Back-Ups Arcade]==
[[File:Maxresdefault.jpg|thumb|298px|Back-Ups Arcade's VS SMB overlay]]
A [[Frontends|frontend]] that showcase’s various overlays with HSM's shader preset and much more by [http://forums.libretro.com/u/Boz1978 Boz1978]. He's aim was to make a AIO software package that seamlessly transitions between game selection and game with no ugly loading screens.

<small>
<div style="height:20em; width:500px; overflow:auto; border:2px solid black;">
{| class="wikitable" style="text-align:center;"
! scope="col"|Features
|-
|
*    Demo Screen: Informative intro video featuring the amazing [https://www.youtube.com/watch?v=PtZwqLoFgd8&t=8s Frank George]!
*    Custom Controllers: Per game Xbox controllers and control schemes.
*    Smoking Options: Choose your smoking preference.
*    Screen Saver: From the amazing [https://www.tasvisuals.com/ TAS Visuals].
*    Overlays: From [https://forums.launchbox-app.com/topic/52435-mr-retrolusts-mame-4k-lights-out-realistic-bezels/ Mr Retrolust], [https://forums.libretro.com/t/my-realistic-arcade-bezels/10604 Orion’s Angel], [https://forums.libretro.com/t/4k-vertical-overlay-community-contributions/25247 Arsinvictus] and [http://forums.libretro.com/u/Boz1978 Boz1978] himself.
*    Shaders: From Libretro’s very own amazing [[#HSM.27s_Mega_Bezel|HyperspaceMadness & HSM]].
*    Music Player: Very awesome tracklist thanks to my works apprentice Mikey.
*    Music Player (In Game): Lets you play music or ambient arcade sounds while in-game!
*    Fade Screens: Each game has a matching fade screen so you never leave your cab!
*    Loading Animations: Per game animated loading animations and sounds.
*    Animated Controllers: Based on the amazing [https://forums.libretro.com/t/super-nintendo-animated-border-update/38358 Fercho]’s animated overlays.
|}
</div>
</small>

Back-Ups Arcade relies of three pieces of software to make it work:
*    Attract Mode Plus: The front end.
*    RetroArch: The back end.
*    RocketLauncher: The intermediary software used for game fades and pause menu.

'''For more information;'''
{{Main|Frontend}}

==[https://reshade.me/#download ReShade]==
ReShade is a '''generic post-processing injector''' for games and video software developed by [https://github.com/crosire crosire]. Similar to libretro, shader effects are saved with a special extension: ".fx", and again similar to libretro you can tweak them to fit your needs or create your own custom preset. '''For preset file location look for ReShade.ini and "CurrentPresetPath=", and it will tell you the location'''. Latest [[Duckstation]] release builds comes with [[PlayStation_emulators#Enhancements|ReShade .fx shader support]].

====[https://github.com/MajorPainTheCactus/SonyMegatron-ReShade Sony Megatron ReShade Port (HDR)]====
:For using this preset you need [[#Notable_shaders_for_using_with_ReShade_Presets|AutoHDR]] add-on for ReShade.

====[https://forums.libretro.com/t/cyberlab-mega-bezel-death-to-pixels-shader-preset-pack/35606/648 CyberLab ReShade Death To Pixels Shader Preset Pack]====

====[https://disk.yandex.ru/d/JO3NUIa0r1X45w Vasiliy.M.'s PCSX2 CRT]====
:<small>[https://youtu.be/dpSi5yn2emY?t=18 Demonstration]</small>

====[https://github.com/frankschoeman/kyubus-shader kyubus Retro CRT]====
:<small>[https://www.youtube.com/@kyubus7814/videos Demonstration]</small>
::Kyubus Retro CRT is a collection of Reshade and RetroArch retro CRT presets using existing shaders such as [[CRT_shaders#CRT-Guest-Advanced|CRT-Guest]], [[CRT_shaders#CRT-Royale|CRT-Royale]] and [[CRT_shaders#CRT-Lottes|CRT-Lottes]]. ::These presets are mainly developed on a monitor resolution of 1440p but presets for 1080p and 4k monitors are included.
::To make the lower resolution shader display correctly RetroArch (or any emulator) integer scaling needs to be switched ON (Settings>video>scaling). GaussianBlur, LumaSharpen and Deband(range) are probably the first parameters you might want to adjust depending on the resolution of the content and your preferences. [https://github.com/frankschoeman frankschoeman] also recommend trying RetroArch shaders underneath such as "/xbr/super-xbr-fast.slangp"(Set Input and Output gamma to 1.0 in shader parameters) and "/cubic/catmull-rom-fast.slangp". In case those aren't available [https://github.com/frankschoeman frankschoeman] suggest setting the preset to one where GaussianBlur is enabled.

====[https://1drv.ms/u/s!Akfc1OCPWC-sg9BB3R1LG2SjK66Cvg?e=nxVGTe AirCon's Retro CRT]====
:<small>[https://www.youtube.com/watch?v=wp_ha411BgY Demonstration]</small>
::Mimics blurry, lightbleeding, uncalibrated inexpensive 8~90's CRT.

====Notable shaders for using with ReShade Presets====
See [[Shaders_and_filters#Notable_ReShade_shaders|this section]].

==Special K==
See [https://www.pcgamingwiki.com/wiki/Special_K PCGamingWiki: Special K page].

==[https://github.com/mausimus/ShaderGlass/releases ShaderGlass]==
[[File:ShaderGlass demonstration.png|thumb|298px|ShaderGlass demonstration]]
Overlay for running GPU shaders on top of Windows desktop (similar to [[#WindowCast_for_Libretro|WindowCast for Libretro]]).

<small>
<div style="height:19em; width:900px; overflow:auto; border:2px solid black;">
{| class="wikitable" style="text-align:center;"
! scope="col"|[https://github.com/mausimus/ShaderGlass#features Features]
|-
|
*applies shader effects on top of any window on the desktop
*includes RetroArch shader library covering: CRT monitor simulation, image upscaling, TV / VHS simulation, softening, denoising, blur, sharpen and many more
*works with most emulators, retro platforms and pixel art editors including: [[POS_(Pong_Consoles)_CPUs_and_Other_Chips#x86_CPUs|DOSBox forks]], [[xemu]], [[PCSX2]], [[FS-UAE]], [[Altirra]], [[ScummVM]], [[VICE]] etc.
*excellent companion for pixel art drawing showing shaded and/or aspect-ratio corrected preview
*you can even use it on top of YouTube, Twitch or modern games
*saving and loading profiles
*multiple operating modes, including borderless fullscreen
*can be captured by OBS (using Game Capture source)
|}
</div>
</small>

[[File:Using VMware_and_WindowCast_libretro_core_with_Duimon_DOSBox_preset.jpeg|thumb|298px|Using [[Windows_2000/XP/Vista_emulators|VMware]] and [[#WindowCast_for_Libretro|WindowCast libretro core]] with [[#Extra_Presets_for_HSM_project|Duimon DOSBox preset]]]]
==[https://forums.libretro.com/t/official-release-thread-for-windowcast-core/40464 WindowCast for Libretro]==
WindowCast for Libretro/libretro-wincapture (formerly WGC Window Capture) Libretro core to capture the contents of another window for video processing. This is useful, for say, capturing the output of a standalone emulator that doesn't have advanced pp shader implementation (like xemu, [[GameCube_emulators#Enhancements|Dolphin]], PCSX2[https://github.com/PCSX2/pcsx2/pull/7498#issue-1466652311 *]) or a PC game running in a window and then processing it with RetroArch's shader stack. [[#WindowCast for Libretro|WindowCast for Libretro]], [[#ReShade|ReShade]] or [[#ShaderGlass|ShaderGlass]] are the only decent way to do this if the emulator doesn't have any advanced pp shader implementation.

This core uses software blit, and should support running with any RetroArch video driver (vulkan, d3d11, gl, etc). However, the method used for window capture is Windows 10/11 specific and requires a Direct3D 10/11 capable GPU. Audio or input is not handled, and it is expected that the game will be running in the background.

[[File:Librashader demonstration.png|thumb|148px|Librashader demonstration]]
==[https://snowflakepowe.red/blog/introducing-librashader-2023-01-14/ Librashader]==
Librashader is a complete reimplementation of the RetroArch slang shader pipeline that allows standalone emulators to easily and optionally implement support for RetroArch-style shaders and shader presets.

This effort is a complete reimplementation of a shader pipeline that should be compatible with all shaders in [https://github.com/libretro/slang-shaders slang-shaders], including the preset parser, the shader preprocessor, and SPIR-V translation, as well as runtime implementations for Direct3D 11, OpenGL, and Vulkan. To be clear, librashader does not “rip out” the shader parts of RetroArch and just repackage it up, but is a complete reimplementation with a [https://docs.rs/librashader/latest/librashader/ fully documented Rust API] that exposes every part of the pipeline.

:You can find [https://github.com/SnowflakePowered/librashader librashader on GitHub].
:Reddit thread: [https://old.reddit.com/r/emulation/comments/17tgpqf/has_there_been_any_interest_in_librashader_support/ Has there been any interest in librashader support?]

==Future==
[[File:EmuVR rooms.gif|thumb|298px|EmuVR rooms]]
Already here thanks to Virtual Reality game room simulation projects. A VR game room simulation provides a virtual [https://www.emuvr.net/wiki/Customization#Posters customizable] game room; within that room there are cartridges, CD/DVDs and VHS tapes with [https://docs.google.com/spreadsheets/d/1RdMTzZhVW811lTHfKmAZvux2Z_tLdwU4PazVHytpLXg/edit#gid=604246325 artworks (CD/DVD covers, cartridge/VHS labels etc.)], arcade machines, VCD/DVD/VHS player, personal computers or home consoles connected to virtual CRT screens that the user can interact with as they would a real-life TV.
{{Main|Virtual_reality#VR_game_room_simulations}}

*[https://www.youtube.com/watch?v=075FKPRMfTc EmuVR example demonstration]
*[https://www.youtube.com/watch?v=xZsBaOFi9vM EmuVR netplay update]
*[https://www.youtube.com/watch?v=otNKBqxOLPE EmuVR with <abbr title="Screen-Space Ray Traced Global Illumination shader">RTGI</abbr> example demonstration #1]
*[https://www.youtube.com/watch?v=snBg45ES-II EmuVR with <abbr title="Screen-Space Ray Traced Global Illumination shader">RTGI</abbr> example demonstration #2]

==See also==
*[[CRT_shaders|CRT shaders]]
*[[Shaders_and_filters|Shaders and filters]]
*[[NTSC_filters|NTSC filters]]
*[[High dynamic range]] (HDR)

==External Links==
*[https://forums.libretro.com/c/retroarch-additions/retroarch-shaders  RetroArch Additions - Shaders] 
*[https://reshade.me/forum/shader-discussion/6140-reshade-shaders-repository-index Reshade Shaders Repository Index]
*[https://thingsiplay.game.blog/2022/10/04/discovering-sonkuns-crt-guest-advanced-ntsc-slot-mask-presets/ thingsiplay's article on sonkun's preset pack]
*[https://www.youtube.com/watch?v=OIagIphxSwg "Integrum Retro" showcasing shader presets and overlays]
*"Retro Crisis" showcasing [https://www.youtube.com/watch?v=vDcmPpDUZwA Sonkun's presets], [https://www.youtube.com/watch?v=rEcUOEK8j3c Sonkun's NEW presets with new guest.r shaders], [https://www.youtube.com/watch?v=qhjXeo6e44Q CyberLab's NEW version of CRT-Royale], [https://www.youtube.com/watch?v=VghduLw79-E CyberLab Megatron 4K HDR], [https://www.youtube.com/watch?v=yNmJ0n-QMCY CyberLab's NEW Megatron presets for Death To Pixels Shader preset packs], [https://www.youtube.com/watch?v=_oM1SCv48-E Retro-Crisis-GDV-NTSC NEW PlayStation presets] and podcasts with [https://www.youtube.com/watch?v=9jtpXtJbRps Hyperspace Madness - Creator of Mega Bezel] and [https://www.youtube.com/watch?v=hu3mtPbfMTk CyberLab - Creator of Mega Bezel Death To Pixels Shader Preset Pack]

[[Category:FAQs]]
[[Category:Shaders/Filters]]