LumaClear 1.0.1 — Minecraft 26.3

Compatibility

• Updated for Minecraft 26.3, Fabric and Java 25.
• Requires Fabric API 0.166.0 or newer for Minecraft 26.3.
• Sodium remains optional. Real mixin checks passed without Sodium and with Sodium 0.9.2, 0.9.3-beta.1 and 0.9.3-beta.4.

Lighting and rendering

• Skip unused terrain block/sky-light samples during fullbright while preserving ambient occlusion, directional shading and biome tinting.
• Avoid terrain rebuilds triggered only by lighting updates that cannot change fullbright rendering. Block and geometry changes still rebuild normally; fullbright transitions rebuild terrain to restore baked lighting.
• Keep world/server lighting updates active. The new sampling and light-only rebuild shortcuts fall back to normal behavior when Iris is installed.
• Fix Sodium's fullbright shader integration and reuse bounded shader pipeline variants across settings changes.
• Correct directional-shading hooks across vanilla blocks/fluids, Fabric Indigo and Sodium while retaining ambient occlusion.
• Make individual fog switches independent and prevent fog-only settings changes from rebuilding chunk geometry.
• Fix keyboard preset selection with Enter/Space and reverse cycling with Shift.

Validation and performance

Build, 27 unit tests, four real mixin smoke configurations and eight offline shader combinations passed. The full six-configuration laptop benchmark completed 150/150 valid iterations with zero MineBench warnings; all 2,881,650 frame intervals were independently verified.

On the Adreno X1-85 laptop at 1840×1150 with AO enabled, the mean of five scene-level median FPS values was 410.8 for Sodium, 401.2 for LumaClear Fullbright and 345.1 for LumaClear Clarity. Excluding Nether, Clarity measured 363.2 versus Sodium's 359.6. Sodium controls varied 3.58%, so small differences do not establish a gain or regression. Clearing Nether fog increases the visible terrain workload. These results do not demonstrate a large steady-FPS speedup and are not universal FPS expectations.