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Birch bark

In your harnessProcedural textureMIT

Generate tileable PBR maps of birch bark: chalk-white papery bark with horizontal lenticels, chevron branch scars, dark fissured patches and peeling strips. Use on birch trunks and logs.

Render of Birch bark
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
lenticels, lenticel_length, dark_patches, branch_scars, peeling, hue_shift, saturation, brightness
Presets
default, silver_aged, river_birch, young_smooth
Tileable
yes
Command line
python bark_birch.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. Marks are placed at random in texture space; real birch bark changes along the trunk, which a single tile cannot show. Peeling strips are flat bands with a raised lip, not separate geometry. Occlusion is a blurred-height estimate.

Details

Kind
Procedural texture
Engine
Python 3.10 or later
Files
12 files, 224.8 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
Capsule strokes for lenticels, V-shaped stamp profile for branch scars, Anisotropic fractional Brownian motion thresholded for dark patches, Worley borders for fissures, Ragged ellipse stamps for peeled strips
Tags
texture, pbr, tileable, bark, birch, tree, nature, procedural
Identity
library.supply.creative_originals.66d19325c6ffbbf6bb8f483b.eed96d545cc7bd5d
Version
eed96d545cc7bd5d0f509dc4db287fdc0c1d6856f3e647979859c21eb0421a2c

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

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