Groups/Custom groups

This page lists the various groups which are mainly used in subgames and mods.

(Note: If not group rating is specified, a rating of 1 is assumed.)

Subgames

Minetest Game

Version: 0.4.12

These are the custom groups used by Minetest Game. Many groups listed here have also been adopted by mods and subgames which are not directly related to Minetest Game, but be careful, the intention may not always be equal!

Digging time groups

The following groups determine digging times. The rating can be between 1 and 3; higher ratings result in slower digging.

crumbly: dirt, sand
cracky: tough but crackable stuff like stone.
snappy: something that can be cut using fine tools; eg. leaves, small plants, wire, sheets of metal
choppy: something that can be cut using force; eg. trees, wooden planks
fleshy: Living things like animals and the player. This could imply some blood effects when hitting.
explody: Especially prone to explosions
oddly_breakable_by_hand: Can be added to nodes that shouldn't logically be breakable by the hand but are. Somewhat similar to dig_immediate, but times are more like {[1]=3.50,[2]=2.00,[3]=0.70} and this does not override the speed of a tool if the tool can dig at a faster speed than this suggests for the hand.

ABMs

Groups which are mainly used by ABMs for block interaction:

tree: node is the trunk of a tree (like “Tree”, “Jungle Tree”, etc.). Prevents blocks in leafdecay group from decaying.
leaves: node represents leaves or needles from a tree.
leafdecay: node decays if no block in the tree group is in a radius of the rating.
leafdecay_drop: if node decays because of leafdecay, it will always drop as an item.
flora: used for small plants. Node will slowly spread when placed on a “soil”-group node but it will turn into a dry shrub when it is placed on desert sand.

Fire

Used by the fire mod:

flammable: can be set on fire. Higher values mean more flammable.
puts_out_fire: if in a node with this group is near fire the fire gets extinguished.
igniter: sets flammable nodes on fire. Rating defines the radius.

Crafting

These groups are mostly used in crafting recipes:

sand: node is sand.
stone: node is stone.
wood: node is wood.
wool: node is wool (default rating: 1).

Color

dye: item is a dye.
basecolor_white, excolor_yellow, unicolor_dark_blue_s50, and the like: Declares the color of an item. For all groups that are defined by the dye mod see the init.lua of it.

Note: The various color groups in the dyes mod can be considered as a standard in the modding community. They are also in widespread use, independently of Minetest Game

Shelves

vessel: item is a vessel (small liquids container) and can be put in a vessels shelf.
book: item is a book and can be put in a bookshelf.

Functional

not_in_creative_inventory: the item is not added to the creative inventory. Note: This group is also widespread across other subgames and mods which are unrelated to Minetest Game.

Informational

Misc. groups where their main purpose seems to group similar things together. They may be used for many different tasks

sapling: node is a sapling.
plant: node is a small-sized plant.
flower: node is a flower.
liquid: node is a liquid. Ratings: water=3, lava=2.
lava: node is lava. Used by the obsidian ABM
water: node is water. Used by the buckets mod and for the obsidian ABM
hot: node is hot (used by lava, rating 3).
melty: node can be melted (used by steelblock, rating 3).

Mods

Pedology

https://forum.minetest.net/viewtopic.php?f=11&t=9429

Version: 3.0

wet: Node is wet, rating ranges from 1-5 (higher = wetter). If this group is not present, the node is seen as dry.
oozing: Node will slowly transfert its wetness towards neighboring “sucky” nodes. Rating does not matter.
sucky: Node is able to receive wetness from neighboring wet and oozing nodes. Rating does not matter.
sun_dry: Node will dry off over time when exposed to sunlight. Rating must be 1.

This was only a quick overview. Refer to the mod's README.md for a more detailed and up-to-date information.

Realistic Suffocation

https://forum.minetest.net/viewtopic.php?f=9&t=15304

Version: 1.0.0

This mod introduces 2 groups:

disable_suffocation: This mod won't add suffocation (drowning damage for solid full cube blocks) to nodes in this group (rating: 1)
real_suffocation: This group is added by this mod to all nodes it modified (added drowning damage) (rating: 1)

Slime blocks and liquids

https://forum.minetest.net/viewtopic.php?f=11&t=10423