> Quote -  Oooh neat! With a change of colour this may work for mould or lichen as well

Here's my attempt at lichen.  It's a little too bright (had to multiply the shader by .25) and still a little too see-through.  Lichen should hide the features a little IMO because it won't grow on a surface smoothly.

WARK!

Thus Spoketh Winterclaw: a blog about a Winterclaw who speaks from time to time.

 

(using Poser Pro 2014 SR3, on 64 bit Win 7, poser units are inches.)