What makes BSL Shaders so popular are the highly-customizable features and optimization options that add a realistic aesthetic to the game. These packs work thanks to Optifine or Iris, which are optimization and appearance tools available for Minecraft. When installing and activating a shader pack, players can expect significant upgrades ranging from realistic lighting, and water effects, to sun rays and 3D textures. Minecraft shaders are a type of shader pack specifically designed for the popular sandbox video game, Minecraft. BSL Shaders 1.20.1 → 1.20.2 is one of the most popular shaders available for Minecraft, created by Capttatsu back in 2015, with more than 27 million downloads in CurseForge alone.