Clear Coat

Adds a secondary specular layer on top of base material. Creates dual-layer reflections for car paint, varnished wood, coated plastics.

Requires MATERIAL_CLEAR_COAT constant.

Parameters

clearCoatNormalTexture

texture

Default:Normal Z up

Normal map for clear coat layer

MATERIAL_UNTEXTURED: false

clearCoatRoughnessTexture

texture

Default:White

Roughness texture for clear coat layer

MATERIAL_UNTEXTURED: false

clearCoatRoughness

float

Default:0

Roughness of clear coat layer

clearCoatNormalTexScale

float

Default:1

Clear coat normal map tiling scale

MATERIAL_UNTEXTURED: false

clearCoatStrength

float

Default:0

Strength of coating layer effect

Example

clearCoatStrength: 1.0
clearCoatRoughness: 0.0

Shader Implementation

// Roughness from green channel
clearCoatRoughness *= texture(clearCoatRoughnessTexture).g;

// Normal map with custom UV scale
vec2 clearCoatUv = uv * clearCoatNormalTexScale;
vec3 clearCoatNormal = sample_normal_map(clearCoatNormalTexture, clearCoatUv);