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Cracked lake ice with bubbles and skate scratches

In your harnessProcedural textureMIT

Generate tileable maps of frozen lake ice: clear black or milky ice with white fracture planes, a polygonal crack network, trapped air bubbles, stacked methane bubbles and skate scratches. Use for frozen lakes, rinks, ice caves and winter ground.

Render of Cracked lake ice with bubbles and skate scratches
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
fractures, network, plates, bubbles, pancakes, scratches, milkiness, hue_shift and 2 more
Presets
default, methane_bubbles, skating_rink, pressure_cracked
Tileable
yes
Command line
python lake_ice_cracked.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. Cracks and bubbles inside the ice are painted into the albedo, not modelled in depth, so there is no parallax or refraction through clear ice; a shader that wants depth can use the albedo as a view-independent layer under a glossy surface. Fracture planes are a bright line with a fainter offset sheet, a stylized reading of slanted cracks. The crack network is a Worley diagram broken by noise. Bubbles smaller than about half a pixel at the output size are left out. Occlusion is a blurred-height estimate.

Details

Kind
Procedural texture
Engine
Python 3.10 or later
Files
12 files, 244.2 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
Jagged random-walk polylines with wrap-around capsule painting, Offset translucent sheet beside each crack for a slanted fracture plane, Worley cell borders broken by fractal noise for a crack network, Jittered grid placement and ring stamps for bubbles, Stacked soft discs for methane bubbles, Height to tangent-space normal by central differences
Tags
texture, pbr, tileable, ice, frozen lake, cracks, bubbles, winter
Identity
library.supply.creative_originals.1aaeafdd604702f0f52304ae.9269908aff7824e1
Version
9269908aff7824e1c3a9b6a931b9e6e4d9718958ee99b209401b640dafee62a1

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

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