Light, strong nylon woven with a reinforcement grid every few millimeters — extra-thick threads in both directions form little squares that stop a small tear from running across the whole fabric. Silicone-coated on both sides for waterproofing and a slightly slick hand. The default fabric for ultralight tents, hammocks, stuff sacks, kites, parachutes, and packable wind shells. Cuts and sews readily, hot-cuts to seal the edge, weighs almost nothing, packs tiny. The fabric ultralight backpackers measure their gear in grams of.
Plain-weave nylon 6 or 6,6 (70 denier yarn typical, with reinforcement yarns every 5–10 mm) coated with silicone elastomer on both sides at 20–35 g/m² per side. Total fabric weight ~33–40 g/yd² (~1.1–1.3 oz/yd²). Tear strength benefits from the ripstop grid — a small slit propagates only to the next reinforcement yarn, where it stops. Tear strength 35–80 N (warp/weft); tensile strength 35–55 lbf/in. Silicone coat is more flexible and lower-stretch than polyurethane (PU) coatings, but cannot be seam-taped — silnylon shelters need liquid seam sealer (silicone-mineral-spirits paste). Hydrostatic head 1500–3000 mm (water column). UV degrades the nylon over years of exposure; the silicone protects somewhat. Hot-cuts cleanly with a soldering iron or hot-knife — the cut edge fuses and resists fraying.
Principled BSDF defaults derived from the sphere fibrous finish. Reasonable seed for Blender, Substance, Keyshot, Rhino — tune per material. Or grab the whole library at once: ForMaterials library →
# finish: fibrous albedo #5a8c66 metallic 0.00 roughness 0.70 ior 1.45 transmission 0.00 clearcoat 0.00 sheen 0.70 anisotropic 0.50
{
"albedo": "#5a8c66",
"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
# Ripstop Nylon (70 Denier, Silicone-Coated) · finish: fibrous
import bpy
mat = bpy.data.materials.new(name="mat_ripstop_nylon_70d")
mat.use_nodes = True
bsdf = mat.node_tree.nodes["Principled BSDF"]
bsdf.inputs["Base Color"].default_value = (0.1022, 0.2623, 0.1329, 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
# Ripstop Nylon (70 Denier, Silicone-Coated) · finish: fibrous
# Run from Window → Scripting Console
import lux
mat = lux.createMaterial(name="mat_ripstop_nylon_70d", materialType="Generic")
mat.setProperty("diffuse", (90, 140, 102)) # 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": "Ripstop Nylon (70 Denier, Silicone-Coated) \u00b7 finish: fibrous",
"baseColor": {
"r": 0.1022,
"g": 0.2623,
"b": 0.1329
},
"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_ripstop_nylon_70d",
"pbrMetallicRoughness": {
"baseColorFactor": [
0.1022,
0.2623,
0.1329,
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
# Ripstop Nylon (70 Denier, Silicone-Coated) · finish: fibrous
def Material "mat_ripstop_nylon_70d" {
token outputs:surface.connect = </mat_ripstop_nylon_70d/PreviewSurface.outputs:surface>
def Shader "PreviewSurface" {
uniform token info:id = "UsdPreviewSurface"
color3f inputs:diffuseColor = (0.1022, 0.2623, 0.1329)
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
}
}
INVISTA / Brookwood ripstop technical literature.
House vocabulary — terms ForMatter uses with intent.
Materials and processes for people who design and make things.
A local-first library of materials, processes, applications, and finishes — equal weight, citable everywhere, so a student can move from "what is this" toward "what's actually buildable here, now, by me." 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, Lefteri, Forty, Sparke, ASM, GIA. Every voice: Voices.
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