Minecraft 26.3 Snapshot 2 introduces order-independent transparency and performance tweaks
Minecraft Java Edition 26.3 Snapshot 2 adds a new order-independent transparency (OIT) rendering algorithm to fix translucency issues, replaces the previous Improved Transparency, and brings various performance tweaks, mob behavior optimizations when players are far away, shader updates, and extensive data-pack and world-gen changes. It also lists known issues (e.g., pink screen on Mac with Vulkan and lighting anomalies) and includes numerous technical changes and bug fixes related to rendering, blocks, and world generation.