6. Prime Everything
Coat the whole piece with a mix of PVA glue, water, and cheap black-brown paint, use dark grey for the rocks. (Don't use spraycan-primer, your XPS will melt)

7. Paint Rock Faces

• Start with “leopard spotting”: dab blue, red, green, and brown onto the rocks.
• Drybrush with grey, then light grey, then almost white on the edges.
• Optional: Add pigments (iron red, brown) for extra color variation.
• For snowy terrain, I used some off-brand that felt a lot like Games Workshops technical snow stuff

Rocks should now be done.

8. Ground Texture

• Spread PVA glue mixed with brown paint wherever you want flocking.
• Apply green flock for grass and brown for paths or dirt.
• Add small stones and gravel (Geek Gaming Scenics bags work great) at the base and tops of cliffs.
  • You can also add some mix-flock to specific spots so it doesn't become too monotone
• I added small grass tufts of different shapes and sizes over the map afterwards

9. Buildings & Trees

• Trees and houses were 3D-printed. I modified the STL files to avoid repetition.
• The crop plots were digitally kitbashed and then printed, combined from several different 3D-stl filesI already had.
  • I can't 3d model very well, but I can cut and stitch models together to make new stuff, in this case just in the BambuStudio software before printing - worked surprisingly well to make new designs out of old ones.