How about this...take a sunset preset(in this case I used Red Sunset).In the box to the far left at top,change the sun glow,and horizon colour to dark blue/black,sun colour to black .Change the shadow ambiance,sky dome and haze settings to dark blue/black,cloud colour to grey and sun colour to very pale blue/grey.In the skylab(cloud icon)...under the cloud heading,click on the edit button below the cumulous cloud box,click on "noise" and change clouds to 3D,click check and exit.In the sun/moon settings(this is using Bryce7Pro)increase sun intensity to around 340 and reduce the specular setting to 48.The sun now acts as your full moon,although you will have to add stars in a paint program since they don't appear in a day setting.