        <autoExposure>
            <!-- key luminance, minExposure, maxExposure -->
            <key value="-1 -1.0 1.5" time="0" />
            <key value="-1 -1.0 1.5" time="5" />
            <key value="-1 -0.5 0.75" time="8" />
            <key value="-1 -0.5 0.75" time="18" />
            <key value="-1 -1.0 1.5" time="21" />
            <key value="-1 -1.0 1.5" time="24" />
        </autoExposure>
		
		<primaryExtraterrestrialColor>
            <key value="0.04 0.04 0.04" time="0" />
            <key value="0.04 0.04 0.04" time="6.5" />
            <key value="1.7 1.7 1.7"    time="6.5" />  <!-- sunrise switch -->
            <key value="1.7 1.7 1.7"     time="19.5" /> <!-- sunset switch -->
            <key value="0.04 0.04 0.04" time="19.5" />
            <key value="0.04 0.04 0.04" time="24" />
        </primaryExtraterrestrialColor>