1. Constant Shaders

Constant shaded color and not affected by lighting. It is probably the most basic shader to produce.

Constant Color

A simple pure shaded color.

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Constant Texture

A simple pure shaded color from texture.

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2. Iridescence Shader

A simple iridescence effect inspired by the Goniochromism phenomenon, which varies its aspect based on the relationship between the surface normal and the camera angle. The visual beautification is due the pseudo noise function, that makes the aspect a little more appealing.

                
                  float NaiveNoise(vec3 freq, vec3 offset) {
                    // Naive noise function to make irregularity
                    return sin(2.0*PI*P.x*freq.x*2.0 + 12.0 + offset.x) +
                      cos(2.0*PI*P.z*freq.x + 21.0 + offset.x) *
                      sin(2.0*PI*P.y*freq.y*2.0 + 23.0 + offset.y) +
                      cos(2.0*PI*P.y*freq.y + 32.0 + offset.y) *
                      sin(2.0*PI*P.z*freq.z*2.0 + 34.0 + offset.z) +
                      cos(2.0*PI*P.x*freq.z + 43.0 + offset.z);
                  }

                  vec3 iridescence(
                    float orient,
                    float noiseMult,
                    vec3 freqA,
                    vec3 offsetA,
                    vec3 freqB,
                    vec3 offsetB
                  ) {
                    // This function returns a iridescence value based on orientation
                    vec3 irid;
                    irid.x = abs(cos(
                      2.0*PI*orient*freqA.x + NaiveNoise(freqB, offsetB)*noiseMult + 1.0 + offsetA.x
                    ));
                    irid.y = abs(cos(
                      2.0*PI*orient*freqA.y + NaiveNoise(freqB, offsetB)*noiseMult + 2.0 + offsetA.y
                    ));
                    irid.z = abs(cos(
                      2.0*PI*orient*freqA.z + NaiveNoise(freqB, offsetB)*noiseMult + 3.0 + offsetA.z
                    ));

                    return irid;
                  }
                
              

Iridescence Simple

A simple iridescent shader.

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