PosterizationShader is a lightweight shader pack for Minecraft that applies an artistic posterization effect to the game's visuals. The shader reduces the number of colors to create a stylized "poster" look with visible color bands. Made by sasiaanders, it leans cursed and ships colored lighting. Expect it to run comfortably from medium-tier hardware upward, on Minecraft 1.21.11 – 1.21.11 via Iris or OptiFine. Licensed MIT, so the download is mirrored right here on MineSpecs — no ads, no redirects.

How to install PosterizationShader

1. 1Install a shader loader for Minecraft 1.21.11 — Iris (pairs with Sodium) or OptiFine. PosterizationShader is a shaderpack, so it needs a loader to run.
2. 2Download the PosterizationShader .zip from the button above — keep it zipped. It is mirrored on MineSpecs, so there is no ad-gate or redirect.
3. 3Drop the .zip into your .minecraft/shaderpacks folder (%appdata%\.minecraft\shaderpacks on Windows, ~/Library/Application Support/minecraft/shaderpacks on macOS).
4. 4Launch the game, open Options → Video Settings → Shaders, and select PosterizationShader.

First time? How to install Minecraft shaders

Performance & what to expect

PosterizationShader is rated medium performance impact. It wants a mid-range dedicated GPU. Drop render distance a few chunks if you fall below 60 FPS. It renders colored lighting. The look is cursed.

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PosterizationShader is created by sasiaanders and mirrored here under its MIT licence. MineSpecs is an unofficial fan project and is not affiliated with sasiaanders, Mojang Studios or Microsoft.