>>96223269
>>96224281
>>96224409
Yeah real moss and lichen, its been collected more than a year back so is very dry. I dip it into watered down pva, it will suck up the pva and "fill out" where the fuzz will fluff out when wet. The PVA kind of plasticizes the moss when its dry, its hard to the touch and doesn't bend. Acrylic paint coats after that also help seal it in a plastic coat.
That said I've still got old moss ferns that I didn't treat with PVA at all on bases from 10 years back and they are all fine but have lost some color and gone brown vs green.

>>96224208
I basecoated with an airbrush in a mottled pattern, no solid coats just patches of color in the rough areas:
Rocks: S75 African Shadow, AK Burnt Umber, VMC English Uniform
Plants: Castellan Green, Warpstone Green, Moot Green, Elysian Green
Then drybrush of cream/offwhite followed by a bunch of darker washes/inks/contrasts to add some shadows then back to washes of the basecoat colors to put some saturation back.
(pic is halfway through airbrush mottle)