A block can be considered solid if it has a collision box that players, mobs, or other entities cannot move through and those caught inside a solid block may suffocate. For a block to be solid it also has to not by broken by flowing liquids. Blocks such as iron blocks are solid, and cobwebs are nonsolid, because players can move through them slowly and water flow can break them.
Solid blocks are also considered when generating structures.
List of blocks
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The reason is that duplicating material is probably a bad idea from a maintenance perspective.
List of solid blocks
The following blocks are all solid blocks. They are categorized by their material.
|Unknown||Not applied to any blocks.|
|Snow layer (2-8)|
List of non-solid blocks
These blocks consist of any block that is not solid.
|Snow layer (1)|
Most solid blocks are 1 meter high, but certain blocks have non-standard block heights.
A player can fit through spaces as small as 1.8125 (2 - 3⁄16) blocks high, since players are 1.8 blocks tall. This allows players to fit through a 2-block gap with a floor as high as a trapdoor or less.
When sneaking, a player can fit through spaces as small as 1.75 (2 - 1⁄4) blocks high, since sneaking players are 1.65 blocks tall. This allows players to fit through a 2-block gap with a floor as high as 3 layers of snow or less.
When gliding with elytra, a player can fit through spaces as small as 0.625 (1 - 3⁄8) blocks high, since gliding players are 0.6 blocks tall. This allows players to fit through a 1-block gap with a floor as high as 4 layers of snow, or a flower pot, or a daylight sensor, or less.
Note that doors, although appearing to be one 2-meter-high block, are actually composed of two (top and bottom) 1-meter-high blocks.
Here is a list of blocks with non-standard heights, from tallest to shortest in height:
- Although boats are entities, players can step on them.
- These blocks are also thinner, or put another way, their area having this non-standard height does not cover the width/length of a full block.
|Java Edition pre-Classic|
|Cave game tech test||Added grass blocks and cobblestone, the first two types of solid blocks.|
|Solid blocks were the only available type of block, until rd-161348, when the first legitimately-obtainable non-solid blocks (saplings) were added.|