@Override
    public Vector3f[] getSphericalHarmonicsCoefficients() {
        return shCoef;
    }
Create a new IBL env baker

@param rm
           The render manager used to render the env scene
@param am
           The asset manager used to load the baking shaders
@param format
           The format of the color buffers
@param depthFormat
           The format of the depth buffers
@param env_size
           The size in pixels of the output environment cube map (eg.
           1024)
@param specular_size
           The size in pixels of the output specular cube map (eg. 1024)
jme3-core/src/main/java/com/jme3/environment/baker/IBLHybridEnvBakerLight.java