card harness dynamic changes

spikes/card-harness/README.md

@@ -7,7 +7,7 @@ The approved visual baseline is recorded in [`CURRENT-DEFAULTS.md`](CURRENT-DEFA
 ## Included proof scope
 
 - David printed-ink, foil, and holographic presets
-- Independently selectable paper, linen, plastic, metal, and wood substrates
+- Independently selectable paper, linen, metal, and wood substrates
 - Timothy as the second-artwork fixture
 - David color-based coverage and title-panel protection; automatic saturation/value coverage for Timothy
 - Procedural rounded-card geometry generated from shared physical dimensions
@@ -28,6 +28,21 @@ Transform gizmos and a general timeline are intentionally deferred. The separate
 ## Tear-open foil pack prototype
 
 Choose **Pack** in the Mode selector (expand **Controls** first on mobile).
+Use **Pack style** in the same toolbar to compare three wrapper-only design studies:
+
+- **Cathedral glass:** deep blue, geometric stained-glass window artwork, and restrained gold.
+- **Illuminated manuscript:** warm ivory, burgundy, and botanical manuscript linework.
+- **Quiet modern** (initial selection): dark green, generous space, and a small sacred emblem.
+
+All three use the same wording, foil material, pouch geometry, lighting, card contents,
+and opening animation. These are alternative visual studies, not different pack tiers
+or reward odds. Switching styles changes the front, back, and matching tear strip in
+place, preserving the current tear/inspection state. Use **Restart** to compare sealed
+packs; the chosen style is retained across Restart and mode switches, but not a page
+reload. On mobile, reopen **Controls** after entering Pack to access the selector.
+The six front/back textures are generated once and uploaded during pack preparation,
+then reused for instant switching. No illustration service or external asset is needed.
+
 Drag the gold top seam **to the right**, or use **Tear open** for the same authored opening without dragging:
 
 **Sealed → progressive tear → strip curls away → mouth spreads → staggered card extraction → face-down stack → lifting → lifted → revealing → inspecting → advancing → next stack / complete.**
@@ -105,8 +120,8 @@ silhouette, back, or thickness. This linen look was visually approved September
 2026 as `linen-relief-v1-2026-09-10`; its exact defaults are recorded in
 [`CURRENT-DEFAULTS.md`](CURRENT-DEFAULTS.md#linen). No extra toggle or configuration
 is required: selecting Linen applies it in Inspect, Lab, and the authored pack.
-Plastic has a smooth clear-coat
-highlight even in Printed ink mode. Wood uses raised longitudinal grain with
+The legacy Plastic shader recipe remains readable by older saved experiments but is
+not offered in the UI or randomized packs. Wood uses raised longitudinal grain with
 bounded procedural parallax, stronger relief, and a restrained warm tint.
 The artwork stays anchored while grain shading and tint shift together.
 Metal retains its reflective underprint and uses luminance-driven recesses: