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Debug Block Collision

Debug Block Collision

MOD
A client-side mod that allows debug rendering of block collision boxes.
by Phylogeny
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2,451 downloads
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Updated Oct 14, 2026
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Map and Information Miscellaneous
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 It can be difficult to ensure that complex sets of block collision boxes are positioned properly.

This client-side mod makes this easier by rendering the collision/bounding boxes of blocks.

Issues should be submitted via GitHub (here), if possible, but can be submitted internally, if need be.

This mod has been released into the public domain. Use it anywhere in any way.

 

Color Key:

green = full collision boxes

blue = non-full collision boxes

red = bounding boxes (for blocks with no collision boxes)

 

Pressing F3 + the 'Mode' keybind (default = letter O) will toggle debug box rendering.

While rendering is enabled, pressing the 'Mode' keybind on its own will cycle the mode:

 

Radius

 

 

Collision

 

 

Hovered - Not Sneaking

 

 

Hovered - Sneaking

DebugBlockCollision-1.12.2-1.0.3.jar
MC 1.12.2
Release 2018-09-05 Get
DebugBlockCollision-1.12.2-1.0.1.jar
MC 1.12.2
Release 2018-09-02 Get
DebugBlockCollision-1.12.2-1.0.2.jar
MC 1.12.2
Release 2018-09-02 Get
DebugBlockCollision-1.12.2-1.0.0.jar
MC 1.12.2
Release 2018-09-01 Get

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