metal ยท diff
git:20261028.62f2e2f to git:20261031.845cf45
1 added, 1 removed. Audit A to A.
---
name: metal
description: Create realistic procedural metal materials with Three.js TSL on WebGPU. Use for trains, rails, machinery, structures, vehicles, pipework and industrial infrastructure.
---
# Metal
- Target: Three.js 0.186.1, `three/webgpu` and TSL node materials from `three/tsl`; WebGPU only, no WebGL fallback, no GLSL strings.
+ Target: Three.js 0.187.0, `three/webgpu` and TSL node materials from `three/tsl`; WebGPU only, no WebGL fallback, no GLSL strings.
## Physical categories
Distinguish:
- painted metal
- bare aluminium
- stainless steel
- polished steel
- cast iron
- machined metal
- brushed metal
- galvanised metal
- oxidised metal
- weathered structural steel
Do not use one generic metallic material for everything.
## Core response
Control:
- metalness
- roughness
- specular response
- base colour
- normal variation
- anisotropy where appropriate
- clearcoat only when a coating physically exists
Brushed metal should have directional anisotropic response.
## Surface variation
Use subtle procedural variation for:
- machining marks
- brushing
- fine scratches
- oxidation
- dirt
- fingerprints
- edge wear
Variation should be correlated with physical causes.
## Wear
Exposed edges can show more wear. Recesses can accumulate dirt. High-contact areas can become polished. Horizontal exposed surfaces can collect deposits.
Do not apply uniform random noise.
## Scale
Large structural metal should have broad, restrained variation. Close-up machined components can have finer detail.
## Train/rail guidance
Train exterior: usually coated/painted metal rather than bare metal.
Rails: steel with directional wear, polishing and environmental oxidation.
Underbody: darker, rougher, dirtier metal with higher variation.