Add clouds and rain

[bolox]

thermal intensity seems to alter the degree of temperature gradient/'icing'- 10 =full icing (default setting!- 0-1 would be a more realistic setting for a summer BoB scenario. Thunder clouds seem to have a higher gradient to other cloud types, to me at least )

MidSize seems to alter the size of the 'blocks' making up a cloud formation- as you reduce CloudDensity these become more apparent.

This is how it appears to work for me at least