Complete PBR material sets (base colour, normal, roughness, metallic, ambient occlusion, and height) for testing material-generation models and physically-based renderers channel by channel.
Base-colour / albedo map — the diffuse reflectance with no lighting baked in. Part of the brick wall PBR set — pair with the other channels in this group.
Tangent-space normal map encoded from the surface height — perturbs shading normals for detail without extra geometry. Part of the brick wall PBR set — pair with the other channels in this group.
Roughness map (black = glossy, white = matte) driving the microfacet spread of the BRDF. Part of the brick wall PBR set — pair with the other channels in this group.
Metallic map (black = dielectric, white = metal) selecting the reflectance model per texel. Part of the brick wall PBR set — pair with the other channels in this group.
Ambient-occlusion map darkening crevices where ambient light is blocked. Part of the brick wall PBR set — pair with the other channels in this group.
Height / displacement map used for parallax or true displacement of the surface. Part of the brick wall PBR set — pair with the other channels in this group.
Base-colour / albedo map — the diffuse reflectance with no lighting baked in. Part of the wood planks PBR set — pair with the other channels in this group.
Tangent-space normal map encoded from the surface height — perturbs shading normals for detail without extra geometry. Part of the wood planks PBR set — pair with the other channels in this group.
Roughness map (black = glossy, white = matte) driving the microfacet spread of the BRDF. Part of the wood planks PBR set — pair with the other channels in this group.
Metallic map (black = dielectric, white = metal) selecting the reflectance model per texel. Part of the wood planks PBR set — pair with the other channels in this group.
Ambient-occlusion map darkening crevices where ambient light is blocked. Part of the wood planks PBR set — pair with the other channels in this group.
Height / displacement map used for parallax or true displacement of the surface. Part of the wood planks PBR set — pair with the other channels in this group.
Base-colour / albedo map — the diffuse reflectance with no lighting baked in. Part of the brushed metal PBR set — pair with the other channels in this group.
Tangent-space normal map encoded from the surface height — perturbs shading normals for detail without extra geometry. Part of the brushed metal PBR set — pair with the other channels in this group.
Roughness map (black = glossy, white = matte) driving the microfacet spread of the BRDF. Part of the brushed metal PBR set — pair with the other channels in this group.
Metallic map (black = dielectric, white = metal) selecting the reflectance model per texel. Part of the brushed metal PBR set — pair with the other channels in this group.
Ambient-occlusion map darkening crevices where ambient light is blocked. Part of the brushed metal PBR set — pair with the other channels in this group.
Height / displacement map used for parallax or true displacement of the surface. Part of the brushed metal PBR set — pair with the other channels in this group.
Base-colour / albedo map — the diffuse reflectance with no lighting baked in. Part of the woven fabric PBR set — pair with the other channels in this group.
Tangent-space normal map encoded from the surface height — perturbs shading normals for detail without extra geometry. Part of the woven fabric PBR set — pair with the other channels in this group.
Roughness map (black = glossy, white = matte) driving the microfacet spread of the BRDF. Part of the woven fabric PBR set — pair with the other channels in this group.
Metallic map (black = dielectric, white = metal) selecting the reflectance model per texel. Part of the woven fabric PBR set — pair with the other channels in this group.
Ambient-occlusion map darkening crevices where ambient light is blocked. Part of the woven fabric PBR set — pair with the other channels in this group.
Height / displacement map used for parallax or true displacement of the surface. Part of the woven fabric PBR set — pair with the other channels in this group.
Base-colour / albedo map — the diffuse reflectance with no lighting baked in. Part of the ceramic tiles PBR set — pair with the other channels in this group.
Tangent-space normal map encoded from the surface height — perturbs shading normals for detail without extra geometry. Part of the ceramic tiles PBR set — pair with the other channels in this group.
Roughness map (black = glossy, white = matte) driving the microfacet spread of the BRDF. Part of the ceramic tiles PBR set — pair with the other channels in this group.
Metallic map (black = dielectric, white = metal) selecting the reflectance model per texel. Part of the ceramic tiles PBR set — pair with the other channels in this group.
Ambient-occlusion map darkening crevices where ambient light is blocked. Part of the ceramic tiles PBR set — pair with the other channels in this group.
Height / displacement map used for parallax or true displacement of the surface. Part of the ceramic tiles PBR set — pair with the other channels in this group.
A sphere with the glTF core metallic-roughness material — full metal, low roughness, no textures, so the numbers in the JSON are the whole material. The baseline half of the metallic-roughness vs specular-glossiness twin.
The same metal expressed in the archived specular-glossiness model, carried in `extensions` with an equivalent metallic-roughness fallback and NOT listed in extensionsRequired. The correct shape for an asset that must keep loading in viewers which dropped specular-glossiness support.
A sphere whose material opts out of lighting entirely via KHR_materials_unlit — the shading path used for baked scenes, maps and stylised art. Renders as a flat silhouette in a conformant viewer and as a lit ball in one that ignores the extension, which makes the difference obvious.
Emission pushed past the core spec's 0-1 emissiveFactor clamp by a 6x strength multiplier — the extension that exists because HDR bloom needs values core glTF cannot express. A tone-mapping and bloom-threshold fixture.
A rough red base under a full-strength, near-mirror clearcoat lobe — the two-layer material that car paint, lacquered wood and phone cases all need. The base and coat roughness differ by an order of magnitude, so a renderer that collapses the layers is obvious.
One mesh, two named material variants (Copper and Cobalt) selectable at runtime — the extension behind every product configurator that swaps a finish without reloading geometry. The primitive also carries a plain `material`, so viewers with no variant support still render something.
Three identical spheres differing only in alphaMode, arranged left to right. The MASK sphere's base alpha (0.45) sits deliberately just under its 0.5 cutoff, so a correct renderer discards it entirely while a renderer that treats MASK as BLEND draws it semi-transparent.
Two open half-shells with identical geometry and opposite `doubleSided` flags. Because the shells are open you can see straight into them, which is the only way to tell backface culling from a lighting difference.
A smooth-shaded sphere as Wavefront OBJ with `mtllib`/`usemtl` pointing at a sibling MTL. Downloading the OBJ alone gives you the classic missing-material case; downloading both reproduces the glTF metallic-roughness twin in this group.
The material library for the OBJ in this group, carrying both the original Phong fields and the de-facto PBR extensions (Pr roughness, Pm metallic, Ke emissive). The file that tells you whether an importer reads MTL's PBR additions or only its 1995 subset.
The same sphere and the same brushed-metal material as the OBJ+MTL pair in this group, but as a single self-contained GLB. Convert the OBJ+MTL and diff against this to score an OBJ-to-glTF material converter.
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