Reflectivity

Reflectivity parameters define how a surface interacts with light through roughness and metallic properties, determining everything from mirror-like reflections to diffuse scattering.

Parameters

Parameter	Type	Default	Range
roughness	float	1.0	[0.0, 1.0]
roughnessTexture	texture2d_ref	null	-
metallic	float	0.0	[0.0, 1.0]
metallicTexture	texture2d_ref	null	-

Parameter Details

roughness

Type: float Default: 1.0 Range: [0.0, 1.0]

Microscopic surface irregularity controlling light scattering.

• 0.0 = Smooth (mirror reflection)
• 0.5 = Semi-rough
• 1.0 = Rough (maximum scatter)

roughnessTexture

Type: texture2d_ref Default: null Format: Grayscale, Linear color space

Spatially-varying roughness. Multiplied with roughness parameter.

• Channel: Green (G)
• Values: 0 = smooth, 1 = rough

metallic

Type: float Default: 0.0 Range: [0.0, 1.0]

Surface metalness.

• 0.0 = Dielectric (plastic, wood, stone)
• 1.0 = Metal (iron, copper, gold)
• 0.0-1.0 = Mixed (oxidized/painted metals)

metallicTexture

Type: texture2d_ref Default: null Format: Grayscale, Linear color space

Spatially-varying metallic properties.

• Channel: Blue (B)
• Values: 0 = dielectric, 1 = metal