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Rocket engines do not always have exciting visible flames shooting out. This is due to fuel mixture and partly due to air moisture. The dry air in Australia shown below of a British rocket launch helped with this effect. Moisture on the moon or in space is zero.

flameless engines

The top half of the Lunar Module launched from the Moon to bring the astronauts back into orbit, there was no flame from the engine. Obviously, every rocket has a visible flame, so the take off was faked... caught you again NASA!

Secondly there will be no sound reflection by launching from the moon as it takes place in a vacuum. Therefore no water deluge system was required; hence no vast volumes of steam either.