Grayscaled Lightmap - Version 1.0.0 is a release file of the Minecraft shader Grayscale Lightmap, made for Minecraft 1.21.2-Snapshot, 1.21.6-snapshot, 1.21.5, 1.21.8, 1.21.4, 1.21.5-Snapshot, 1.21.3, 1.21.7, 1.21.6, 1.21.4-Snapshot, 1.21.2, 1.21.9-snapshot. It was published on August 18, 2025 and is 0.1 MB in size. For the full description, screenshots and every other version, visit the Grayscale Lightmap 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.