https://modrinth.com/shader/phial
Phial is a work-in-progess minecraft shader that aims to add several post-processing options to mimic pixel art.
As of the latest version it has:
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Color quantization to limit the screen colors to a arbitrary color palette. (defaults to the Ressurect 64 palette)
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Customizable pixel mapping to lower the screen resolution
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Ordered dithering
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Customizable vignette
To input custom palettes, you can unzip the shader and locate the palette file at:
shaders\assets\palette.glsl
This requires a special format of storing colors, namely a vector 3 GLSL array. To quickly convert a list of hex colors to this format, you can use the following site:
https://snorfield.github.io/HEX-to-RGB/
Once converted, you can simply open the palette.glsl file in a text editor such a notepad and replace the contents. Don't forget to save!
All you need to do to see the changes is reload the shader.
