Accurate Block Hitboxes

Accurate Block Hitboxes creates selection outlines directly from visible block models. Block orientation, state, connections, and open or closed variants are handled automatically.

Features

Model-accurate selection outlines for 2D and 3D blocks
Pixel-accurate transparency for plants and other cross-face models
True diagonal surfaces without staircase-like approximations
Thin 2D hitboxes with a thickness of 0.5 texture pixels
Support for models with a 3D base and additional 2D parts
Seamless outlines for doors, tall plants, beds, and other multi-block structures
Optional updates based on the currently visible frame of animated textures
Separate Vanilla hitbox whitelist to reduce flickering target switches
Projectiles can pass through model holes when their center ray fits through the gap
Configurable projectile hole pass-through support

Configuration

YACL can be used to configure the mod, 2D and 3D support, animated textures, additional model parts, and seamless connections. A block blacklist and a Vanilla hitbox whitelist are also available.

Requirements

Minecraft 1.21.1
NeoForge 21.1
YetAnotherConfigLib 3

Notes

Player and entity collision remains unchanged; projectiles use the model center ray for supported block holes.
Block entity renderers are currently excluded.
minecraft:tall_seagrass is blacklisted by default because animated geometry can be expensive to rebuild.
Vanilla is the current primary target. Resource packs and modded baked models may work, but are not fully guaranteed yet.