Better Chunk Culling

Better Chunk Culling is a performance mod for Minecraft 1.12.2 designed to significantly increase FPS, especially on low-end hardware and processors with integrated graphics

How it works

Minecraft's default system processes chunk sections in rigid rectangular blocks. Better Chunk Culling replaces this behavior by implementing a 3D ellipsoidal culling algorithm, skipping 16x16x16 block sections that fall outside the player's natural line of sight.

To keep CPU usage to a minimum, it uses an optimized squared elliptical distance calculation without performing heavy square root operations:

Distance^2 = (dx)^2 + (dy * k)^2 + (dz)^2

Note: Because non-visible chunks are aggressively culled to maximize frame rates, in some cases minor lighting glitches or delays in block rendering updates may occur, so I recommend using the Alfheim Lighting Engine mod

Benchmark results

Tests conducted on legacy low-end hardware (Intel Pentium E2220 CPU @ 2.76GHz with Intel GMA 3100 / G31 integrated graphics):

• Without mod (MixinBooter only): 16 FPS | 75/2704 Chunk sections rendered
• With Better Chunk Culling: 27 FPS | 42/1936 Chunk sections rendered
• Performance gain: +68% FPS increase and approximately 45% reduction in GPU load

Notice: This may not apply to all hardware configurations, but it worked in my case

Bug reports

If you find any issues or visual bugs, please report them on the GitHub Issue Tracker