Lucis

[26.2-1.2.1] - 2026-07-15

This update should technically fix most if not all obscure lighting issues related to client syncing and smooth overall server-side calculations. To mention, now Lucis uses much more optimized data structures and bitmasks making calculations significantly faster.

Added

• Added runtime region batching for block changes, including deduplication by block position and promotion of large update batches to full regional relights.
• Added bulk runtime write handling to suppress per-block updates and enqueue regional full relights for large block-edit operations.
• Added packed RuntimeLightChangeBuffer and RuntimeRegionBatch paths for lower-allocation runtime relighting.

Changed

• Reworked runtime update scheduling to group work by runtime region, preserve pending batches, coalesce full relights, and requeue skipped batches more safely.
• Reworked runtime material change handling to skip no-op changes and run sky/block relighting only when affected light properties actually changed.
• Reworked light material caching to use packed integer values with dynamic opacity handling and explicit glass, foliage, skylight, and runtime-relevant flags.
• Optimized region extraction by reading chunk sections directly and reusing scratch buffers during population.
• Optimized block and skylight propagation queues with power-of-two ring/bucket buffers and bitmask-based highest-level lookup.
• Optimized nibble packing with row-base unrolling and a dedicated section byte-packing helper.
• Optimized publishing to skip clean chunks in multi-chunk regions and handle single-chunk regions more directly.
• Changed async worldgen relighting to extract chunk data before worker execution and track pending worldgen tasks.

Fixed

• Fixed race conditions around async relighting by working from prepared/extracted light data and publishing against the expected chunk instance.
• Fixed rare cases where chunk light could be lost during runtime publishing.
• Fixed stale/glowing skylight below newly placed roofs, including deep sections and large roof slices outside the previous shallow repair band.
• Fixed skylight behavior for partial opacity, leaves, and transparent glass material changes.
• Fixed dirty-section publication when skylight-relevant material changes do not change the numeric light level.
• Fixed block-light runtime updates so opacity-only changes near existing block light can trigger recomputation.
• Fixed runtime queue behavior when a region is already scheduled or submit limits are hit.

Removed

• Removed the obsolete benchmark settle timer.
• Removed the temporary RegionChunkSnapshot path after replacing it with the lower-overhead extraction/runtime flow.
• Removed the old object-based RuntimeLightChange record in favor of packed runtime change buffers.