BattleAngelAlita

//from http://extremelearning.com.au/unreasonable-effectiveness-of-quasirandom-sequences/

//1d
g = 1.6180339887498948482 //golden ratio
a1 = 1.0/g
x[n] = (0.5+a1*n) %1

//2d
g = 1.32471795724474602596 //plastic constant
a1 = 1.0/g

BattleAngelAlita

//from https://learnopengl.com/PBR/IBL/Specular-IBL
float RadicalInverse_VdC(uint bits) 
{
    bits = (bits << 16u) | (bits >> 16u);
    bits = ((bits & 0x55555555u) << 1u) | ((bits & 0xAAAAAAAAu) >> 1u);
    bits = ((bits & 0x33333333u) << 2u) | ((bits & 0xCCCCCCCCu) >> 2u);
    bits = ((bits & 0x0F0F0F0Fu) << 4u) | ((bits & 0xF0F0F0F0u) >> 4u);
    bits = ((bits & 0x00FF00FFu) << 8u) | ((bits & 0xFF00FF00u) >> 8u);
    return float(bits) * 2.3283064365386963e-10; // / 0x100000000
}

BattleAngelAlita

void vert(inout appdata_full v, out Input o) 
{
  UNITY_INITIALIZE_OUTPUT(Input, o);
  
  // get the camera basis vectors
  float3 forward = -normalize(UNITY_MATRIX_V._m20_m21_m22);
  float3 up = float3(0, 1, 0); //normalize(UNITY_MATRIX_V._m10_m11_m12);
  float3 right = normalize(UNITY_MATRIX_V._m00_m01_m02);
  
  // rotate to face camera