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Speckled granite

In your harnessProcedural textureMIT

Generate tileable PBR maps of granite and similar crystalline stone: interlocking feldspar, quartz and dark mineral grains, optional large crystals, from polished to flamed. Use for counters, paving, cladding and monuments.

Render of Speckled granite
The render its check recorded in Godot 4.7.2, 256 by 256 pixels.

What it takes and gives

Entry point
generate
Maps
albedo, normal, roughness, height, ao
Parameters
grains_across, feldspar, dark_minerals, phenocrysts, finish, hue_shift, saturation, brightness
Presets
default, rose, black_galaxy, flamed_grey, blue_larvikite
Tileable
yes
Command line
python granite_speckled.py --size 1024 --seed 7 --preset NAME --out DIR [--width W --height H] [--set NAME=VALUE] [--directx-normal] [--orm]
Godot material
material.tres
Blender builder
blender_material.build_material(folder)

Limits. Grains are Voronoi cells with one colour each, an approximation of crystal fabric; there is no twinning beyond a single line, no reflective flake and no real mineral optics. Colours are artistic, not matched to named quarries. Occlusion is a blurred-height estimate.

Details

Kind
Procedural texture
Engine
Python 3.10 or later
Files
12 files, 254.3 KB
Licence
MIT
Declared effects
runs commands, writes files
Checked with
Godot 4.7.2, gl_compatibility
Checks
command line generates declared maps, maps decode, maps have declared size and channels, maps tile without a seam, normal vectors unit length facing out, maps carry detail, godot imports the maps, godot material template loads every map, godot compatibility render, capture shows the textured surface, blender builds the material
Techniques
Worley noise cells as mineral grains, Weighted per-cell hashing for mineral choice, Rotated rectangle stamps with clipped corners for phenocrysts, Finish-dependent relief and roughness per mineral, Height to tangent-space normal by central differences
Tags
texture, pbr, tileable, granite, stone, speckled, polished, procedural
Identity
library.supply.creative_originals.2be5c9c08bad21ecb0acbcb5.3f48987993d3a9e8
Version
3f48987993d3a9e8335128ef14192487f07828a663aca146d2d944f20aa0ef6f

The version is the SHA-256 of the item your harness downloads; every file in it names its own checksum.

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