Convert Lift Gamma Gain coefficients from PostProcessing V2 to URP 12.x

ConvertLiftGammaGain.cs

// URP has a tool to convert postprocessing volumes but it doesn't transform the coefficients so the visuals won't look the same
// This does the transformation to make them match.

private static void ConvertLiftGammaGainValues( VolumeProfile profile )
{
  if( profile != null && profile.TryGet( out LiftGammaGain lgg ) && lgg.active )
  {
    if( lgg.lift.overrideState )
    {
      lgg.lift.value = new Vector4( Mathf.LinearToGammaSpace( lgg.lift.value.x * 0.2f / 0.15f ),
        Mathf.LinearToGammaSpace( lgg.lift.value.y * 0.2f / 0.15f ) ,
        Mathf.LinearToGammaSpace( lgg.lift.value.z * 0.2f / 0.15f ) ,
        lgg.lift.value.w * 0.2f );
    }

    if( lgg.gamma.overrideState )
    {
      lgg.gamma.value = new Vector4( Mathf.LinearToGammaSpace( lgg.gamma.value.x ),
        Mathf.LinearToGammaSpace( lgg.gamma.value.y ),
        Mathf.LinearToGammaSpace( lgg.gamma.value.z ), 
        lgg.gamma.value.w * 0.8f );  
    }

    if( lgg.gain.overrideState )
    {
      lgg.gain.value = new Vector4( Mathf.LinearToGammaSpace( lgg.gain.value.x ),
        Mathf.LinearToGammaSpace( lgg.gain.value.y ),
        Mathf.LinearToGammaSpace( lgg.gain.value.z ), 
        lgg.gain.value.w * 0.8f );
    }
  }
}