In some cases, Cg shaders cannot be supported.
Retroarch -set-shader "" -LThe shader path can be relative to the shader directory:
Retroarch -set-shader "D:\RetroArch\shaders\shaders_glsl\blurs\kawase_blur_5pass.glslp" -LThe -set-shader command line option allows to set shaders directly, bypassing even automatic shader presets. This is so we never get references to references (which are not supported). Note that custom saved presets are always saved as copies and automatic presets cannot point to automatic presets. This allows you to change your custom preset without having to resave the automatic one every time. If you make changes and still want a automatic preset to point to it, you can first save it as a custom preset and then immediately save an automatic preset. If any changes were made to the menu preset, it'll be saved as a copy like usual. From the shader menu you can create such reference presets by first loading any shader preset and then immediately saving it as an automatic shader preset. Presets can use a #reference "" directive, which will act as if the preset with the given path was loaded instead. without the need of hitting Apply Changes
Note: If the preset uses scaling methods which are not simple, (i.e. The last pass in the chain then is streched to fullscreen using the Settings -> Video -> Bilinear Scale filter setting. 2x for first pass and 2x for second pass will give you a 4x total scale. "Don't Care" uses Settings -> Video -> Bilinear Scale. Shader #N Filter: Hardware filter used for scaling. All shaders must be of the same type (i.e.glsl. For every shader pass you can configure: - Shader #N: Path to a shader. You can edit shader presets or build your own using these tools: - Shader Passes: The number of shader passes to use. There are plenty of user created default presets that come bundled with the RetroArch installation and these can be updated from Main Menu -> Online Updater -> Update Glsl|Slang|Cg Shaders (you can find these presets in the shaders_glsl|slang|cg subfolders of your shader directory) The shader directoy can be changed via Settings -> Directory -> Video Shader. By default automatic presets will save to under /presets/"name-of-core"/"name-of-core/directory/game".glslp|slangp|cgp or presets/global.glslp|slangp|cgp in the shader directory while custom presets are saved in the base shader directory. This will save time if using the same preset for multiple games or cores. You can also save custom non-automatic shader presets via Quick Menu -> Shaders -> Save -> Save Shader Preset As, so if you create your "perfect" combination of shaders you can recall this at any time with Load Shader Preset then continue on to save it as an automatic preset. If more than one automatic presets exist that could be applied, the most specific one wins out, so for example, if both a global and a game preset exists, the game preset will be used. Note that directory and game presets are also core specific. Directory presets apply to all content in a certain folder and Game presets apply just to one game.
Global presets are automatically applied in any content for any core, while the Core presets are applied in any content for that specific core.
They can be loaded via Quick Menu -> Shaders -> Load Shader Preset and if you want to keep the shader in-between play sessions, you can save them as an "automatic" preset via Quick Menu -> Shaders -> Save -> Save Global/Core/Directory/Game Preset. Shader Presets are combinations of one or more shaders.