Firmament

Expanded Minecraft compatibility: one ZIP for 29 Java Edition versions.

Compatibility

• Compatibility targets now include 1.18.2; 1.19, 1.19.1, 1.19.2 and 1.19.4; 1.20–1.20.6; 1.21–1.21.11; 26.1, 26.1.1, 26.1.2, 26.2 and 26.3.
• Automatic material selection handles older grass names and newer leaves, flowers, bushes and copper lights. No separate shader ZIP is needed per version.
• Use the Iris and Sodium builds matching your Minecraft version; 26.2 and 26.3 target the OpenGL renderer. Versions outside the list are not included.
• The adaptation passed automated source, material and OpenGL checks. Recorded gameplay evidence remains 1.21.1 / NeoForge 21.1.228 / Iris 1.8.12 / Sodium 0.6.13, captured with 0.1.0-alpha.2 and the same GLSL. Additional Minecraft and Iris combinations still await in-game validation; the new version list is not a claim of 29 game tests.

Notes

• Existing lighting, clear underwater surfaces, all three dimensions and the Balanced, High and Ultra presets are preserved.
• Keep the ZIP intact, place it in shaderpacks, select Firmament in Iris, start with High and adjust the preset for your setup.