Improve roads, cabins, forests, and woodland communities

README.md

@@ -74,11 +74,30 @@ Features
 - Redwoods are enabled automatically. The biome classifier marks high-rainfall,
   higher-relief areas as redwood forest, then places titan trees, dirt/mulch
   floor cover, tall grass, and occasional fallen logs.
+- General forests grow as broad, coherent oak, maple, birch, pine, spruce,
+  walnut, and cypress stands with occasional companion species. Seeded
+  clearings, sparse field trees, regenerating edges, mature interiors, variable
+  tree height, and irregular crown spacing keep the distribution from resolving
+  into a uniform grid.
 - Cabins are enabled automatically. With `--trails`, cabins only try to spawn on
   chunks crossed by the trail network so their spur paths can connect to roads.
   Without `--trails`, cabins can still spawn, but they are rarer and unconnected.
+- Cabin generation includes compact homesteads, longhouses, two-story houses,
+  L-shaped cabins, cross-gabled lodges, mixed-height tower lodges, and rambling
+  multi-wing cabins. Roof direction, wing height, material palette, windows,
+  porches, chimneys, decay, and path width vary by design.
+- Seeded woodland-community regions raise the local cabin frequency and give
+  their roads permission to bridge narrowly bounded water at exact sea level.
+  Eligible crossings must have nearby dry banks on both sides; deep water,
+  broad lakes, and open ocean remain impassable. Bridges use raised spruce
+  decks, timber supports, and intermittent edge posts rather than gravel fill.
 - Trails are optional because they need a prepass over the target area. Use
   `--trails` when you want roads and better-connected cabins.
+- Long roads search a broad terrain corridor and prefer valley floors, gentle
+  contour-following grades, low ridge crossings, and stable side slopes. Deep
+  water remains impassable; shallow water is crossed only when the detour cost
+  is greater, keeping fords and causeways short. Short cabin spurs use looser
+  engineering constraints so they can still reach the main network.
 
 Minecraft Version
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