I think that the most common mistake people make is that they want to make
a night scene (or any scene with darkness) and so they just put very dim
lighting. Then they have their monitor brightness set to maximum and their
room in total darkness (as seems surprisingly common). Result: Almost
everyone else sees a mainly black image.
  A night/moonlight scene is not best done with dim lighting, but with very
high contrast. At night the contrast between lit and shadowed areas is much
higher than at daylight.
  (Even though the general lighting level is much dimmer at night, the human
eye adapts to this (the pupil gets larger) and in photography a longer
exposure time is used, which achieves practically the same thing. This means
that lit areas look approximately the same bright than in daylight, but
shadows look a lot darker.)

-- 
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -

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