Minecraft guides — page 5
Practical write-ups on commands, datapacks, building and server performance — each one paired with the tool that does the work.
A predicate with one condition has no wrapper, and that is a real shape change
One condition is the object itself. Two or more get wrapped in all_of or any_of. Plus the eight condition types, and why inverting is a wrapper rather than a flag.
A .nbt structure stores palette indexes, not block names — which is why it is so small
Three keys hold an entire build: size, palette and blocks. Each block is an integer pointing into the palette, so a 32³ volume of stone costs one string and 32,768 small entries — a position and an index each, never a name.
The advancement tree: 126 advancements, and Story has no challenges at all
Adventure holds 47 of the 126 and the End just 9. 70 are dead ends, the longest chain is 8 deep, and the Story tab is the only one with zero challenge frames.
Aikar's flags change at 12 GB — five of them, and one goes down
Copying a 4 GB flag set onto a 16 GB server leaves five values wrong. Here is exactly which five, plus the player count where a modded server crosses the line and a vanilla one does not.
A Bedrock skin pack is four files, and two of its failure modes are silent
Two UUIDs that must differ, a lang file that is not optional, and skin keys that strip punctuation — so 'My Skin!' and 'My Skin?' become one skin with no error.
Bedrock has no standalone cape pack — a cape only ships attached to a skin
There is no cape-only .mcpack format. Every cape must be paired with a skin entry that names it, which is why a cape pack is really a skin pack with an extra PNG per entry.
Biome temperature decides rain, snow or nothing — and 18 biomes get no weather at all
67 biomes in 26.3. Every biome at temperature 2.0 is dry, all six remaining dry ones are in the End, and only 10 biomes snow at every height.
Breeding food: 16 of 29 mobs accept exactly one item, and bees accept 29
Minecraft defines breeding food as tags. Over half the mobs take a single item, horses take eight, wolves eighteen, and the frog has a food tag pointing at other mobs.
Alternating rows grow twice as fast as a solid field — the formula says so
Moist alternating rows give a 1-in-3 growth roll; a dry solid field gives 1-in-13. Planting every block halves your growth points, and hydration is worth more than layout.
Custom paintings and discs need two packs, and installing one of them is the usual failure
The datapack registers the content; the resource pack supplies the texture and the sound. Datapack alone and it registers with nothing to show. Plus the 16×16 limit and what disc length really controls.