Retail SEAMLESS at the same spot (user-confirmed) => real acdream bug: the eye seats
in a sparse 5-poly connector cell 0xF6820118 looking back at the player's room 0116,
and acdream drops 0116 (back-portal side-culled) so the doorway aperture shows the fog
clear color = grey; retail keeps 0116 drawn. RULED OUT: null-root/AD-20/AD-21 (root
valid, eyeInRoot=Y); the color-clear gating (retail's gated DrawCells Clear is
depth/stencil, post-LScape::draw). Next step = retail cdb trace (viewer_cell +
cell_draw_list at the grey pose) to pin viewer-cell PICK vs portal FLOOD, then a careful
frozen-render fix. Full handoff + apparatus + DO-NOT-RETRY + code/decomp sites in the doc.
Keeps the offline cell-geometry inspection test.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
