Rebuild the foliage with leaf cards: leafier silhouette at two thirds the triangles

docs/3d-model-review.md

@@ -285,6 +285,23 @@ The chosen s48 is the `head_proto` default; the rejected s24/s64 stay local unde
 front/three-quarter/profile) is
 [`blender_previews/sheet_head_proto_before_after.jpg`](blender_previews/sheet_head_proto_before_after.jpg).
 
+## Foliage language P1 — resolved 2026-11-06
+
+The ranked P1 was that shrubs read as rocks: `_shrub()` stacked spheres, so the silhouette was
+smooth and the light response was a single facet per clump.
+
+`_leaf_card()` replaces the stack: one low-poly inner mass for opacity, then 18–53 two-triangle
+quads scattered over the canopy shell by a jittered Fibonacci distribution, each rotated onto the
+canopy normal and tilted off it. No alpha texture, so the flat-colour library and the Compatibility
+renderer are untouched.
+
+| Prop | Before | After |
+| --- | --- | --- |
+| `planter_box` | 1,324 tris | 818 |
+| `round_planter` | 1,240 tris | 808 |
+| `street_tree` | 2,592 tris | 1,506 |
+| Props total (20) | 13,808 | 11,784 |
+
 ## Scorecard skeleton
 
 Verdicts use `qa-review` semantics: **P0** (blocker: wrong scale, broken normals, budget fail),