Player feedback after the border-drop fix did NOT close the
"gray corners" complaint: "I do not see anything change." The
border was a real artifact, but the *visible* gray came from a
different source.
Root cause: pile markers are 8%-alpha-white sprites sized to
the card area, sitting at `Z_PILE_MARKER = -1.0` beneath every
card. Composited against the dark play surface, the marker's
effective colour is ≈`#272727` — visibly gray. When a card
(rounded corners, opaque body) sits on top, the marker's
rectangular fill bleeds through the 4 small triangular regions
where the card's rounded corner curves cut away from the card's
bounding rectangle. That bleed-through is the "gray L" the
player saw at each card corner.
Fix: hide pile-marker sprites for any pile that has a card on
top. New `sync_pile_marker_visibility` system runs each Update
tick, guarded by `game.is_changed()` so the work skips on idle
frames. Iterates `(&PileMarker, &mut Visibility)` and sets
`Hidden` for occupied piles, `Inherited` for empty.
This implements the *documented* invariant declared in the
module-level doc comment ("Pile markers ... remain visible only
where a pile is empty") that was previously not enforced —
markers always rendered. Strictly speaking this is a
documentation-vs-implementation drift fix, not a behaviour
change.
### Why the border-drop fix didn't address this
The border drop changed the SVG stroke and removed *one* source
of corner artifacts (anti-aliased red/near-white stroke fading
through gray). It correctly drifted 52 face hashes. But the
visible gray at corners came from a *different* layer — the
pile-marker sprite *behind* the card, not the card stroke
itself. Right test target, wrong visible-artifact target.
Two layers, two fixes; this commit closes the second.
### Test
New `pile_markers_hide_when_pile_is_occupied` pins the
post-deal state: 8 markers hidden (stock + 7 tableau), 5
markers visible (waste + 4 foundations). 1192 passing
(+1 from prior 1191).
Workspace clippy clean.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
funman300
4d48cad4e3