Collection of tileable procedural textures:

• value noise (with derivatives and gradient rotation)
• gradient noise (with derivatives)
• perlin noise (with gradient rotation)
• checkerboard (diagonal)
• patterns: tile weaves, cross, waves, stairs
• celullar noise (with derivatives and phase)
• metaballs (variant of cellular noise)
• voronoi (edges, cells)
• fbms (value, perlin, voronoi and derivative)
• domain warping (fbnm and gradient curl)
• hexagonal grid and noise variant

Functions: hash3D (from 1D to 4D), noise, noised and gridNoise.

Functions: gradientNoise, gradientNoised and gradientNoiseDisorder.

Functions: perlinNoise, perlinNoised and organicNoise.

Functions: cellularNoise (F1), cellularNoise (F2), metaballs and cellularNoised.

Functions: cellularNoise.

Functions: voronoi, cracks, voronoiPattern and voronoi (tile position of the cell).

Functions: noiseHexagons and noiseHexagonsd.

Functions: checkerboard, checkerboard45, randomLines and dotsNoise.

Functions: metaballs, wavePattern, stairsPattern and crossPattern.

Functions: tileWeave.

Functions: tileHexagons and tileHexagonsRadii (utility).

Functions: fbm, fbmPerlin (mode == 4u), fbmGrid and fbmMetaballs.

Functions: fbmMulti.

Functions: fbmd and fbmdPerlin.

Functions: fbmPerlin (mode: 0u, 1u, 2u, 3u).

Functions: fbmGrayscaleImaged and fbmImage.

Functions: fbmWarp and fbmPerlinWarp.

The Q and R values of the warp can be used to mix different patterns/colors:

    vec2 q, r;
    float f = fbmWarp(p, scale, factors, octaves, shifts, phase, gain, vec2(lacunarity), slopeness, 0.0, true, 0.0, q, r);
        
    col = mix(vec3(0.1,0.5,0.8), vec3(0.6,0.6,0.3), clamp((f * f) * 8.0, 0.0, 1.0));
    col = mix(col, vec3(0.0, 0.1, 0.05), length(q));
    col = mix(col, vec3(0.8, 0.8, 0.8), r.x);
    col = mix(col, col * vec3(0.8, 0.4, 0.2), 0.5 * pow(length(r), 4.0));

Functions: perlinNoiseWarp and curlWarp.

Based on:

• Filtering the checkerboard pattern by Inigo Quilez.
• Value noise derivatives by Inigo Quilez.
• Voronoi edges by Inigo Quilez.
• 2D distance functions by Inigo Quilez.
• GPU Texture-Free Noise by Brian Sharpe.
• Modifications to Classic Perlin Noise by Brian Sharpe.
• Hash Functions for GPU Rendering by Mark Jarzynski.

Bug reports and pull requests are welcome on GitHub at https://github.com/tuxalin/procedural-tileable-shaders.

The code is available as open source under the terms of the MIT License.