Here's a few options, some of which might have already been suggested in the past:
- Gravel - An irregular texture of tiny mixed stones. Just like wood chips, it would generic (non material dependant)
- Sampietrini - Stone pavement, widely used in roman times, made of square stone bricks. Could be material specific.
- Stone slabs - Stone pavement, made of large rectangular stone slabs. Could be material specific.
- Wood walkway - Wood pavement, rustic, suitable for outside pathways. Could be material specific.
- Parquet - Wood pavement, geometric design, made of wood boards. Could be material specific.
- Carpet floor - Cloth pavement. Could be material specific
- Sand - Spread sand like we plant grass to make little private beaches!