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  1. Minecraft: Java Edition
  2. MC-171037

Casting issue: Smoke produced by lava during rain loses precision at high coordinates


    • Confirmed
    • Particles
    • Low

      When it rains on lava, the produced smoke ends up losing precision when far from spawn.

      I remember explicitly testing for this late in 1.15's development and not finding it, so this bug has likely resulted from a very recent change.

      This is best tested when greater than 16,777,216 blocks out on both axes, so being 20 million blocks out should suffice. This issue is without a doubt due to incorrectly casting to a 32-bit float from an integer or double, resulting in numerical precision being lost. This can be fixed by simply not casting to a float, which eliminates any chance of losing any precision.

      Related tickets: MC-182789

            grum [Mojang] Grum (Erik Broes)
            Awesoman3000 Connor Steppie
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