Scheme I used for Infinity units that are suitable for that terrain.

Items needed for the bases: cork sheet, PVA, sand/rocks, still water gel.

Base

1. Add bits of cork sheet, can use more than one layer.
2. Cover in sand.

Paint

1. Undercoat black
2. Layer Yellow Olive
3. Drybrush Yellow Olive & White 1:1
4. Edge Drybrush Yellow Olive & White 1:4

Ink

1. Flat Areas Coelia Greenshade
2. Edges Drakenhof Nightshade
3. Edges Druchii Violet

Paint

1. Light Drybrush White

Glue on static grass tufts, then wrap so you can pour in the still water gel, drop in Coelia Greenshade