Prismarine V4.3a is a release file of the Minecraft shader Prismarine Shader, made for Minecraft 1.17.1, 1.16.3, 1.19.3, 1.20.2, 1.16.1, 1.18.1, 1.17, 1.16, 1.19.4, 1.16.5, 1.18.2, 1.19.2 and more. It was published on March 31, 2024 and is 4.2 MB in size. For the full description, screenshots and every other version, visit the Prismarine Shader shader page.
How to install: Put the .zip into .minecraft/shaderpacks (do not extract it) and select it under Options → Video Settings → Shader Packs. Needs Iris or OptiFine.