CRAFTING PHYSICALLY-BASED MATERIALS

BASE COLOR/sRGB

Defines the perceived color of an object (sometimes called albedo). More precisely:

→ the diffuse color of a non-metallic object
→ the specular color of a metallic object

BASE COLOR LUMINOSITY

METALLIC SAMPLES

NON-METALLIC SAMPLES

METALLIC/GRAYSCALE

Defines whether a surface is dielectric (0.0, non-metal) or conductor (1.0, metal). Pure, unweathered surfaces are rare and will be either 0.0 or 1.0. Rust is not a conductor.

0.0	0.1	0.2	0.3	0.4	0.5	0.6	0.7	0.8	0.9	1.0
NON-METAL/DIELECTRIC					METAL/CONDUCTOR

ROUGHNESS/GRAYSCALE

Defines the perceived smoothness (0.0) or roughness (1.0). It is sometimes called glossiness.

NON-METALLIC

0.0	0.1	0.2	0.3	0.4	0.5	0.6	0.7	0.8	0.9	1.0

METALLIC

0.0	0.1	0.2	0.3	0.4	0.5	0.6	0.7	0.8	0.9	1.0

REFLECTANCE/GRAYSCALE

Specular intensity for non-metals. The default is 0.5, or 4% reflectance.

0.0	0.1	0.2	0.3	0.4	0.5	0.6	0.7	0.8	0.9	1.0

SAMPLES

CLEAR COAT/GRAYSCALE

Strength of the clear coat layer on top of a base dielectric or conductor layer. The clear coat layer will commonly be set to 0.0 or 1.0. This layer has a fixed index of refraction of 1.5.

0.0	0.1	0.2	0.3	0.4	0.5	0.6	0.7	0.8	0.9	1.0
NO CLEAR COAT					FULL CLEAR COAT

CLEAR COAT ROUGHNESS/GRAYSCALE

Defines the perceived smoothness (0.0) or roughness (1.0) of the clear coat layer. It is sometimes called glossiness. This may affect the roughness of the base layer.

0.0	0.1	0.2	0.3	0.4	0.5	0.6	0.7	0.8	0.9	1.0
GLOSSY CLEAR COAT					ROUGH CLEAR COAT

ANISOTROPY/GRAYSCALE

Defines whether the material appearance is directionally dependent, that is isotropic (0.0) or anisotropic (1.0). Brushed metals are anisotropic. Values can be negative to change the orientation of the specular reflections.

0.0	0.1	0.2	0.3	0.4	0.5	0.6	0.7	0.8	0.9	1.0
ISOTROPIC					ANISOTROPIC