Noise volume

A block of 3D gradient noise that tiles in every direction, as bytes, for a shader to sample from a texture instead of computing. Arithmetic noise in a fragment shader is the expensive way to get noise: eight hashed corners a sample, every pixel, every frame. One texture read replaces that, and a mip-mapped texture also fades to its average in the distance where computed noise shimmers.

The ground shader (biome-plugin) uses one for its fine detail. It is pure (no engine, seeded), so the same seed is the same ground everywhere.

import { noiseVolume } from 'tosijs-3d'
const bytes = noiseVolume(64, 16) // 64 texels a side, repeating every 16 cells

A value is 0.5 + 0.5 * gain * n, where n is the noise in about -0.9 to 0.9. The average is 0.5, so a shader reads texel * 2 - 1.