Embeddium - Au Naturel Edit

Changelog - Attempt at Sodium 0.6+ Optimizations and Improvements Backport

Rendering Improvements

• Fence sync fix: Use glClientWaitSync for proper CPU-side synchronization
• Angle-based occlusion masking: Improved culling based on camera angle
• Model extent bounds expansion: Expand bounds by 1 block to prevent clipping of large models
• Light value clamping: Clamp to 8-248 range for GPU compatibility
• Nearby section capture: Ensure sections near camera with large models aren't culled

Memory Management

• Buffer pool reuse: Cache up to 8 GL buffers for reuse instead of constant allocation/deallocation
• Adaptive arena growth: Smart capacity estimation based on segment statistics
• 64-bit buffer offsets: Address up to 4GB (doubled from ~2GB) using unsigned 32-bit semantics, reducing fragmentation at high render distances

Upload Optimization

• Staging buffer limits: Added getUploadSizeLimit() API for frame stall prevention
• Fence cleanup: Fixed fence cleanup in staging buffer delete() method

Batch Caching

• Per-region batch caching: Cache draw command batches per-region
• Incremental rebuild: Only rebuild batches when visible sections change
• Reduced CPU overhead: Less time spent building command buffers each frame

Chunk Builder Task Prioritization

• Camera-direction weighting: Chunks in front of camera mesh first (dot product ordering)
• Priority queue scheduling: Replaced FIFO with heap-based priority queue
• Update type priority: IMPORTANT_REBUILD > IMPORTANT_SORT > REBUILD > INITIAL_BUILD > SORT
• Reduced pop-in: Visible geometry appears before off-screen chunks