Select
the cloud's properties.
The
first of these is Cloud Shape.
The first set of parameters in ‘Cloud Shape'
is the Voxel Number settings. These are the spatial
dimensions of the Cumulonimbus cloud, where X = width,
Y = depth and Z = Height.
The
range, for each of these settings, starts at 10 and
has a maximum value of 100.
Note:
A voxel (‘volumetric pixel' ) is a special kind
of object used for rendering cloudy or gaseous materials.
Below
Voxel Number there is a Random Seed control.
This varies the distribution of the voxels throughout the
cloud' s volume. Try clicking on the up or down
scroll arrows, to change the seed value.