Substance 3D Painter Car Paint PBR shader

Import from libraries.

Copy
import lib-sampler.glsl
 import lib-pbr.glsl
 
 //: param auto channel_basecolor
 uniform SamplerSparse basecolor_tex;
 //: param auto channel_roughness
 uniform SamplerSparse roughness_tex;
 //: param auto channel_metallic
 uniform SamplerSparse metallic_tex;
Copied to your clipboard
import lib-sampler.glsl
 import lib-pbr.glsl
 
 //: param auto channel_basecolor
 uniform SamplerSparse basecolor_tex;
 //: param auto channel_roughness
 uniform SamplerSparse roughness_tex;
 //: param auto channel_metallic
 uniform SamplerSparse metallic_tex;

-------EXTERNAL ---------------------------------------------------//

Copy
//: param custom { "default": "flakes", "label": "Flakes Texture", "usage": "texture" }
 uniform sampler2D flakes_tex;
 
 //: param custom { "default": 25, "label": "Flakes Scale", "min": 1.0, "max": 100.0 }
 uniform float flakes_scale;
 
 //: param custom { "default": 0.75, "label": "Flakes Intensity", "min": 0.0, "max": 1.0 }
 uniform float normalPerturbation;
 
 //: param custom { "default": [0.3,0.3,0], "label": "Flake Color", "widget": "color" }
 uniform vec3 flakeLayerColor;
 
 //: param custom { "default": [0.2,0.0,0.2], "label": "Secondary Paint Color", "widget": "color" }
 uniform vec3 paintColorMid;
 
 //: param custom { "default": [0.3,0.2,0.0], "label": "Tertiary Paint Color", "widget": "color" }
 uniform vec3 paintColor2;
 
 
 void shade(V2F inputs)
 {
   vec3 baseColor = getBaseColor(basecolor_tex, inputs.sparse_coord);
   float metallic = getMetallic(metallic_tex, inputs.sparse_coord);
   vec3 diffColor = generateDiffuseColor(baseColor, metallic);
   // Get detail (ambient occlusion) and global (shadow) occlusion factors
   float occlusion = getAO(inputs.sparse_coord) * getShadowFactor();
 
   LocalVectors vectors = computeLocalFrame(inputs);
 
   //Flakes
   vec3 vFlakesNormal = texture(flakes_tex, inputs.tex_coord * flakes_scale).rgb;
   vec3 vNp1 = normalize(vectors.normal + 0.2 * vFlakesNormal);
   vec3 vNp2 = normalize(vectors.normal + normalPerturbation * vFlakesNormal);
 
   vec3 vNp1World = computeWSNormal(inputs.sparse_coord, inputs.tangent, inputs.bitangent, vNp1);
   float fFresnel1 = max(0.0, dot(vNp1World, vectors.eye));
 
   vec3 vNp2World = computeWSNormal(inputs.sparse_coord, inputs.tangent, inputs.bitangent, vNp2);
   float fFresnel2 = max(0.0, dot(vNp2World, vectors.eye));
 
   float fFresnel1Sq = fFresnel1 * fFresnel1;
   vec3 paintColor =
     fFresnel1 * baseColor +
     fFresnel1Sq * paintColorMid +
     fFresnel1Sq * fFresnel1Sq * paintColor2 +
     pow(fFresnel2, 16.0) * flakeLayerColor;
   diffColor = mix(diffColor, paintColor, metallic);
 
   diffuseShadingOutput(occlusion * pbrComputeDiffuse(vectors.normal, diffColor));
 }
 
 
Copied to your clipboard
//: param custom { "default": "flakes", "label": "Flakes Texture", "usage": "texture" }
 uniform sampler2D flakes_tex;
 
 //: param custom { "default": 25, "label": "Flakes Scale", "min": 1.0, "max": 100.0 }
 uniform float flakes_scale;
 
 //: param custom { "default": 0.75, "label": "Flakes Intensity", "min": 0.0, "max": 1.0 }
 uniform float normalPerturbation;
 
 //: param custom { "default": [0.3,0.3,0], "label": "Flake Color", "widget": "color" }
 uniform vec3 flakeLayerColor;
 
 //: param custom { "default": [0.2,0.0,0.2], "label": "Secondary Paint Color", "widget": "color" }
 uniform vec3 paintColorMid;
 
 //: param custom { "default": [0.3,0.2,0.0], "label": "Tertiary Paint Color", "widget": "color" }
 uniform vec3 paintColor2;
 
 
 void shade(V2F inputs)
 {
   vec3 baseColor = getBaseColor(basecolor_tex, inputs.sparse_coord);
   float metallic = getMetallic(metallic_tex, inputs.sparse_coord);
   vec3 diffColor = generateDiffuseColor(baseColor, metallic);
   // Get detail (ambient occlusion) and global (shadow) occlusion factors
   float occlusion = getAO(inputs.sparse_coord) * getShadowFactor();
 
   LocalVectors vectors = computeLocalFrame(inputs);
 
   //Flakes
   vec3 vFlakesNormal = texture(flakes_tex, inputs.tex_coord * flakes_scale).rgb;
   vec3 vNp1 = normalize(vectors.normal + 0.2 * vFlakesNormal);
   vec3 vNp2 = normalize(vectors.normal + normalPerturbation * vFlakesNormal);
 
   vec3 vNp1World = computeWSNormal(inputs.sparse_coord, inputs.tangent, inputs.bitangent, vNp1);
   float fFresnel1 = max(0.0, dot(vNp1World, vectors.eye));
 
   vec3 vNp2World = computeWSNormal(inputs.sparse_coord, inputs.tangent, inputs.bitangent, vNp2);
   float fFresnel2 = max(0.0, dot(vNp2World, vectors.eye));
 
   float fFresnel1Sq = fFresnel1 * fFresnel1;
   vec3 paintColor =
     fFresnel1 * baseColor +
     fFresnel1Sq * paintColorMid +
     fFresnel1Sq * fFresnel1Sq * paintColor2 +
     pow(fFresnel2, 16.0) * flakeLayerColor;
   diffColor = mix(diffColor, paintColor, metallic);
 
   diffuseShadingOutput(occlusion * pbrComputeDiffuse(vectors.normal, diffColor));
 }
 
 

Last updated 10/3/2024

Was this helpful?

Yes

No