EZvac

Prerelease. The second pilot of 2.1, Realism: EXTENDED: a realistic climate for every biome, seasons, altitude and the ground. The save format is the same as 2.0 (format 6), so it's a drop-in upgrade from ALPHA 2.0 or 2.1 Pilot 1. It includes everything in Pilot 1: biome transitions and the °F/°C switch.

A climate for every biome

The seven broad classes (Snowy, Cold, Temperate, Warm, Hot, Nether, End) are gone. Every vanilla biome now has its own climate, modelled on real places:

• Day and night: clear desert skies let the day heat and the night cool hard; a jungle or the sea barely moves.
• Data-pack biomes get a climate worked out from their Minecraft temperature and rainfall.
• Your own numbers: any biome can be given its own climate under the new biomes: section.

Seasons

/hvac season

• The year: each world with a sun has four seasons, 15 Minecraft days each by default (a 60-day year).

• The curve: temperatures follow a smooth curve, warmest in mid-summer and coldest in mid-winter, with each biome moving by its own amount (the Seasons ± column). Lakes and the sea follow a few days behind.

• Only temperatures change. Biomes, rain and snow stay as Minecraft makes them, so a savanna never snows.

• EZvac keeps its own calendar for each world, in seasons.yml. It counts the world's days, so sleeping moves it on, but setting the clock back (/time set day) never sends the year back to spring.

• Admins can change the season any time:

  • /hvac season set <spring|summer|autumn|winter> [day];
  • /hvac season next;
  • /hvac season pause / resume.

  From the console, add a world's name at the end.

• Tuning: under seasons:, days-per-season, strength (0.5 for mild seasons) and water-lag-days.

Altitude and underground

• Altitude: the air is 0.1 °F colder for every block above y=64, so about 14 °F colder at y=200. High on mountains, rain turns to snow where Minecraft itself snows.
• Underground: deep down, the air holds the ground's steady temperature, like a real mine: no day/night swing, no seasons, no weather. It sets in 4 blocks below the surface (or sea level, whichever is lower) and is complete at 20, so a tall house or a hill never counts.
• Tuning: altitude: and underground:.

On the HUD

• Sidebar: a new line shows the season and its day ("Season: Summer day 3"). It's left out where there are no seasons.
• Tokens and placeholders: {season} and {season_day}, plus %ezvac_season% and %ezvac_season_day%.
• /hvac temperature shows the season and how much it warms or cools the outdoors where you stand.

Upgrading

• Every outdoor climate changes:

  • biomes have their own numbers;
  • mountains are colder higher up;
  • deep spots are steady;
  • the seasons begin on the first day of spring the first time your server starts with this version.

  Rooms drift to the new climate gradually.

• Config: config.yml gains seasons, altitude, underground and biomes automatically, with a backup of the old file. A HUD sidebar that still has the stock lines gains the season line. A sidebar you changed is left alone; add "<gray>Season: <white>{season} <gray>day {season_day}" to show it.

• Saves: thermostats save their seasonal swing (outdoorSeasonalF) once they sample their surroundings.

Full details are in the changelog and the docs.