A leather alternative made from pineapple-leaf fiber — a waste stream from pineapple farming that would otherwise be burned. Ananas Anam (London) developed and commercialized the process from 2013 onward. The non-woven base sheet is bonded with PLA bioplastic and finished with a polyurethane coating; the result feels and works like a thin leather and is widely adopted in fashion.
Non-woven mat of pineapple-leaf cellulosic fibers (~80% by mass) bonded with PLA (~20%) and finished with PU surface coating. Density 0.5–0.7 g/cm³ depending on grade. Tensile strength 9–13 MPa. Surface engineered for color, texture, and finish to match commercial leather aesthetics. Currently 95%+ biobased, with ongoing efforts on the PU finish layer.
Principled BSDF defaults derived from the sphere fibrous finish. Reasonable seed for Blender, Substance, Keyshot, Rhino — tune per material.
# finish: fibrous albedo #a08868 metallic 0.00 roughness 0.70 ior 1.45 transmission 0.00 clearcoat 0.00 sheen 0.70 anisotropic 0.50
{
"albedo": "#a08868",
"metallic": 0.0,
"roughness": 0.7,
"ior": 1.45,
"transmission": 0.0,
"clearcoat": 0.0,
"sheen": 0.7,
"anisotropic": 0.5
}
# Blender 4.x — Principled BSDF
# Piñatex (Pineapple Leaf Fiber) · finish: fibrous
import bpy
mat = bpy.data.materials.new(name="mat_pinatex")
mat.use_nodes = True
bsdf = mat.node_tree.nodes["Principled BSDF"]
bsdf.inputs["Base Color"].default_value = (0.3515, 0.2462, 0.1384, 1.0)
bsdf.inputs["Metallic"].default_value = 0.000
bsdf.inputs["Roughness"].default_value = 0.700
bsdf.inputs["IOR"].default_value = 1.450
bsdf.inputs["Transmission Weight"].default_value = 0.000
bsdf.inputs["Coat Weight"].default_value = 0.000
bsdf.inputs["Sheen Weight"].default_value = 0.700
bsdf.inputs["Anisotropic"].default_value = 0.500
# KeyShot 11+ — lux Python API, Generic material
# Piñatex (Pineapple Leaf Fiber) · finish: fibrous
# Run from Window → Scripting Console
import lux
mat = lux.createMaterial(name="mat_pinatex", materialType="Generic")
mat.setProperty("diffuse", (160, 136, 104)) # 8-bit sRGB
mat.setProperty("metallic", 0.000)
mat.setProperty("roughness", 0.700)
mat.setProperty("indexOfRefraction", 1.450)
mat.setProperty("transparency", 0.000)
mat.setProperty("coatingWeight", 0.000)
{
"_format": "Substance Designer / Painter \u2014 pbrMetalRough constants",
"_about": "Pi\u00f1atex (Pineapple Leaf Fiber) \u00b7 finish: fibrous",
"baseColor": {
"r": 0.3515,
"g": 0.2462,
"b": 0.1384
},
"metallic": 0.0,
"roughness": 0.7,
"ior": 1.45,
"opacity": 1.0,
"anisotropyLevel": 0.5,
"_notes": "Channels listed are the standard Substance pbrMetalRough output. Drop into a Uniform Color node per channel, or as the constant input on a layered stack."
}
{
"asset": {
"version": "2.0",
"generator": "ForMatter"
},
"materials": [
{
"name": "mat_pinatex",
"pbrMetallicRoughness": {
"baseColorFactor": [
0.3515,
0.2462,
0.1384,
1.0
],
"metallicFactor": 0.0,
"roughnessFactor": 0.7
},
"extensions": {
"KHR_materials_ior": {
"ior": 1.45
},
"KHR_materials_sheen": {
"sheenColorFactor": [
1.0,
1.0,
1.0
],
"sheenRoughnessFactor": 0.7
}
}
}
]
}
# USD Preview Surface — UsdShade.MaterialLook prim attributes
# Piñatex (Pineapple Leaf Fiber) · finish: fibrous
def Material "mat_pinatex" {
token outputs:surface.connect = </mat_pinatex/PreviewSurface.outputs:surface>
def Shader "PreviewSurface" {
uniform token info:id = "UsdPreviewSurface"
color3f inputs:diffuseColor = (0.3515, 0.2462, 0.1384)
float inputs:metallic = 0.000
float inputs:roughness = 0.700
float inputs:ior = 1.450
float inputs:opacity = 1.000
float inputs:clearcoat = 0.000
token outputs:surface
}
}
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House vocabulary — terms ForMatter uses with intent.
Materials and processes for people who design and make things.
A local-first library of materials, processes, and applications, equal weight, citable everywhere. Part of the renato.design ecosystem — sibling of Plenum, Specimen, Ingenue, gesture, graf, and the Renato Rhino plug-ins. Form and matter, inseparable.
Half of teaching materials is teaching how the material is made into the thing. The standard subscription library was always light on that half. The wedge here isn't better samples or a prettier interface — it's treating Process as a peer entity, not a footnote.
Conway's Material World on raw materials, Lefteri's Making It on processes, Untracht and McCreight on metalsmithing, USDA Forest Products Lab on woods, GIA on gemstones, Schott / CoorsTek / Toray / Owens Corning datasheets, MakeItFrom for verifiable property numbers, ASM Handbook, ISO standards. Voice blocks: Barthes, Yanagi, Benjamin channeled within their philosophy; Lefteri verbatim. All cited.
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