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Damascus pattern-welded steel

In your harnessProcedural textureMIT

Generate tileable PBR maps of etched Damascus (pattern-welded) steel: bright and dark layers in random, ladder, raindrop or chevron patterns, with varying layer thickness, etch relief and grinding lines, and fine layers kept free of moire. Use for knife blades, swords, rings and props.

Render of Damascus pattern-welded steel
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, metallic, height, ao
Parameters
pattern, layers, distortion, features, randomness, thickness_variation, etch, grind_lines and 3 more
Presets
default, ladder, raindrop, chevron, coffee_etch
Tileable
yes
Command line
python damascus_steel.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. The pattern is a contour model of a distorted layer stack, not a forging simulation; ladder, raindrop and chevron are idealized versions of the smith's grooves, dimples and restacking. Layers finer than about two pixels fade to their average tone instead of drawing, so very fine stacks need a large texture. The etch relief is shallow and best carried by the normal map. Occlusion is a blurred-height estimate, not ray traced.

Details

Kind
Procedural texture
Engine
Python 3.10 or later
Files
12 files, 246.8 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
Layer phase as a whole number of layer pairs plus a periodic displacement, Domain-warped fractional Brownian motion for random folding, Gaussian grooves, summed Gaussian dimples and a triangle wave for ladder, raindrop and chevron, Band contrast faded by the analytic phase gradient against the pixel size, Mean share of a thresholded cosine for unresolved layers
Tags
texture, pbr, tileable, metal, damascus, pattern welded, blade, etched
Identity
library.supply.creative_originals.4578a380cac954d77a165de4.02ee781dcc4c1e51
Version
02ee781dcc4c1e515da3b303364581a34bed786afac462fca9f9297227e408bd

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

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