Minecraft 26.4 snapshot 2

29 Sep 2026

The first 26.4 snapshot after Minecraft LIVE is out, no ice caves yet.

These writeups assume you have read the Official Changelog before continuing.

Table of Contents

World Generation
Data Packs
- Number Providers

World Generation

Mushrooms now only generate underneath motion-blocking blocks, fixing MC-312046 .

Data Packs

Number Providers

Changed the sin and cos float number providers to fix MC-311780 :

The input now rounds towards the nearest quantized angle, with ties rounding towards zero, instead of always rounding towards zero.
Negative inputs use the $\sin(-x) = -\sin(x)$ and $\cos(-x) = \cos(x)$ identities.
The sine of $0$ , $\pi/2$ , $\pi$ , and $3\pi/2$ radians is exactly 0, 1, 0, and -1 respectively.
The cosine of $0$ , $\pi/2$ , $\pi$ , and $3\pi/2$ radians is exactly 1, 0, -1, and 0 respectively.

Uses the following code:

int NUM_ANGLES = 65536;
int QUADRANT_OFFSET = NUM_ANGLES / 4;
double ANGLES_PER_RADIAN = NUM_ANGLES / (2 * Math.PI);

float[] SIN = new float[NUM_ANGLES];
for (int i = 0; i < SIN.length; i++) {
  SIN[i] = (float) Math.sin(i / ANGLES_PER_RADIAN);
}
SIN[0 * QUADRANT_OFFSET] = 0.0f;
SIN[1 * QUADRANT_OFFSET] = 1.0f;
SIN[2 * QUADRANT_OFFSET] = 0.0f
SIN[3 * QUADRANT_OFFSET] = -1.0f;

float sin(float f) {
  double d = (double) f;
  return d >= 0.0
    ? SIN[(int) ((long) (d * ANGLES_PER_RADIAN + 0.5) & (long) (NUM_ANGLES - 1))]
    : -SIN[(int) ((long) (-d * ANGLES_PER_RADIAN + 0.5) & (long) (NUM_ANGLES - 1))];
}

float cos(float f) {
  double d = (double) f;
  return d >= 0.0
    ? SIN[(int) ((long) (d * ANGLES_PER_RADIAN + (double) QUADRANT_OFFSET + 0.5) & (long) (NUM_ANGLES - 1))]
    : SIN[(int) ((long) (-d * ANGLES_PER_RADIAN + (double) QUADRANT_OFFSET + 0.5) & (long) (NUM_ANGLES - 1))];
}