Catalog possible surfaces, soils, and features

[cubap]

What needs to be in the first version for sure? What would be an excellent extension? Can these be subclassed?

[cubap]

Base materials

• Dirt - including soil, clay, humus
• Stone - including sand, gravel, riprap
• Water - still, flowing, swamp/bog

Features

This may not be what is really meant by features (which may mean caves, thickets, ore veins, etc.), but it's a thought I'm having now.

• Forests - stands of trees edged by bushes
• Grasslands - wide plains or prairies of grasses and flowers
• Deserts - where little grows (possible boundary land)
• Highlands - scarce resources, expansive hunting
• Coastal - water-based success with less trees and grasses, but more fishing and water travel opportunities

Maybe the first world is terribly flat and uninteresting, but when more behaviors are nailed down 3D exploration and features like caves and mountains can be added.