Structure Layout Optimizer Mod (26.1.2, 1.20.1) – Optimize Jigsaw Structures

Structure Layout Optimizer Mod improves the performance of Jigsaw structure generation in Minecraft by replacing inefficient VoxelShape intersection checks with more efficient BoxOctree-based calculations.

In vanilla Minecraft, structure piece intersections were verified by comparing all VoxelShape vertices-causing noticeable delays, especially in large or complex builds. This mod replaces the standard VoxelShape with a dummy version containing a BoxOctree, which only checks intersections against neighboring parts. The result? Drastically reduced validation time and smoother generation of massive, recursive Jigsaw structures.

Features:

• Replaces vanilla’s slow VoxelShape checks with a BoxOctree system that only compares nearby structure pieces-cutting down on lag during generation.
• Skips unnecessary checks for Jigsaw Blocks that are blocked or facing boundaries, saving CPU cycles.
• Filters out irrelevant positions early when loading large NBT files, improving load times for massive structures.
• Reduces redundant calls to block properties and simplifies NBT data parsing for Jigsaw Blocks.
• Avoids rechecking duplicate structure pieces with high weights, and optionally deduplicates the pool for even faster generation (at the cost of seed layout parity).
• Swaps heavy StructureBlockInfo lists with lightweight palettes that shrink memory usage when structures aren’t actively generating.

Screenshots:

Requirements:

Minecraft Forge RequiredFabric Loader RequiredFabric API RequiredNeoForge RequiredResourceful Config Mod RequiredCloth Config API Required

Structure Layout Optimizer Mod Download Links