code: package org.sunflow.core.shader;
  
  import org.sunflow.SunflowAPI;
  import org.sunflow.core.ParameterList;
  import org.sunflow.core.Shader;
  import org.sunflow.core.ShadingState;
  import org.sunflow.image.Color;
  
  public class ViewIrradianceShader implements Shader {
      public boolean update(ParameterList pl, SunflowAPI api) {
          return true;
      }
  
      public Color getRadiance(ShadingState state) {
          state.faceforward();
          return new Color().set(state.getIrradiance(Color.WHITE)).mul(1.0f / (float) Math.PI);
      }
  
      public void scatterPhoton(ShadingState state, Color power) {
      }
  }