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Very realistic clouds can be modeled with universal multifractals. Many of the 2D clouds on this site are shown with false colour, so, by way of comparison, under the same false colour scheme, real clouds look like:

And here is a representative multifractal cloud:

	Upper left is the top of a 3D multifractal field of Liquid Water Density (LWC) in (false colours, 256X256X128 grid). At right, we view one of the sides. The horizontal statistics are very close to those observed by aircraft and are close to those of passive scalars, i.e. alpha=1.8, C1=0.1, H=1/3. The vertical stratification is produced with the observed Hz=5/9, with sphero-scale =32 pixels so that it appears to have embedded upward oriented convective type structures. The other fields are produced by simulating the radiation only taking into account single scattering (visible, right top and bottom), and emission and absorption (Infra Red, lower left, radiation field with a mean optical thickness 50, false colours, linear temperature gradient (from 300 K to 220K). The upper right is top view of the visible radiance, sun at 45 degrees, bottom right is the same but viewed looking up from underneath (mean optical thickness=50, viewed from infinity).

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