128px resolution for textures.
64px resolution for UIs.
UI buttons should respect UI scale. 1x1 button should be 64px, 2x2 128px, etc.


Custom node.def fields
_snapshot = a 192px image of the building
_cost = {Food, Lumber, Metal, Stone},
_health = 200,
_max_inv = 0,
_long_desc = 'these are pretty self explanatory'
_initial_count = 100,
