Hi Boguz,
As I do not know which one you are refer to, here is
The dwarf base:
1. I glue pine bark mulch with PVA to the base. After that, I cover the bark again with watered down PVA glue, as the bark is prone to break into slices.
2. When dry, with additional PVA I add some sand, like
https://www.pk-pro.de/CP-Sand
3. Priming with back (I use airbrush)
4. Priming only from above with white
5. Airbrushing with VGC 72088 Blue and VGC 72089 Green inks from above. Stones will have a nice turquoise hue.
6. I mix Vallejo 73108 Brown Iron Oxide pigment with water, and wash the base with it. The pigments will stay in the recesses.
7. IMPORTANT: varnishing with sateen varnish. You can not add snow or drybrush further as the pigments will get everywhere and will ruin everything
8. I mix soda-bicarbonate and matte/sateen varnish to have a dense snow-like material and apply it to the base.
Unfortunately I deleted all of my pictures of this process ~3 days ago, as I thought no one is interested in it.
Good news is that I plan to paint a couple of dwarfs in 2 weeks, so I can take photos, too, if you are still interested.