Unity Editor Tool that prints the spherical harmonics values of the current scene to the console. Useful to retrieve the values for use in other engines.

AmbientLightingHelper.cs

using UnityEngine;
using UnityEditor;
using System.Collections;
using System.Text;
using UnityEngine.Rendering;

public class AmbientLightingHelper : MonoBehaviour {

	[MenuItem("Tools/Print Ambient Probe Values")]
	public static void GetLighting() {
		if( RenderSettings.ambientMode ==  AmbientMode.Trilight) {
			StringBuilder sb = new StringBuilder();
			sb.AppendFormat("ambientEquatorColor: {0}\n", RenderSettings.ambientEquatorColor);
			sb.AppendFormat("ambientGroundColor: {0}\n", RenderSettings.ambientGroundColor);
			sb.AppendFormat("ambientLight: {0}\n", RenderSettings.ambientLight);
			sb.AppendFormat("ambientIntensity: {0}\n", RenderSettings.ambientIntensity);
			Debug.Log(sb.ToString());
		} else {
			PrintProbe(RenderSettings.ambientProbe);
		}
	}

	public static void PrintProbe( UnityEngine.Rendering.SphericalHarmonicsL2 probe ) {
		StringBuilder sb = new StringBuilder();

		sb.Append("var shLight = new THREE.SphericalHarmonicsLight(\n\t[\n");	
		for(int y=0; y<9; y++) {
			sb.AppendFormat("\t\tnew THREE.Color({0},{1},{2})", probe[0,y],probe[1,y],probe[2,y]);
			if (y < 8) {
				sb.Append (',');
			}
			sb.Append ('\n');
		}
		sb.Append("\t]);\n");

		Debug.Log(sb.ToString());
	}
}