Jahni asked for one strate per archetype to look at, and said the previews
looked "not navigable nor anything except maybe the mazes". Both delivered.
⭐ PART A -- HIS EYE WAS RIGHT, AND SO WAS THE METRIC. BOTH EXPLANATIONS
WERE TRUE, and they split by archetype:
archetype walkable FLOOR AREA largest connected surface
CrystalChamber .059 .9999 1.00
FlatPlain .048 .9985 .9998
SurfaceWorld .064 .9374 .9936
Maze .285 .2629 .9905
Underwater .229 .2061 .3312
TunnelNetwork .155 .2084 .4640
VerticalShafts .108 .1138 .1449
FloatingIslands .004 .1016 .4992
1. THE METRIC WAS WRONG FOR CHAMBERS. Walkable fraction is volumetric: an
air cell with solid one step below and headroom above. In a cathedral
almost no air cell is near a floor, so a huge open room scores ~.06 while
a tight maze scores ~.29. It was measuring CORRIDOR-NESS, not
navigability -- and mazes win that by construction, which is exactly the
pattern he spotted. Slab families actually have 94-100% walkable FLOOR
AREA, fully connected. They were never the problem.
2. AND FOUR ARCHETYPES ARE GENUINELY FRAGMENTED, which is a real content
finding, not an artifact. Largest connected walkable surface:
VerticalShafts .14, Underwater .33, TunnelNetwork .46, FloatingIslands
.50. In VerticalShafts, 86% of the floor is unreachable from the biggest
patch. The primordial law still passes -- you CAN get from arrival to
departure -- but most of the floor is not part of that. That is precisely
"not navigable" and it needed a new metric to see.
New metrics: WalkableFloorAreaFraction, NumWalkableSurfaceComponents,
LargestWalkableSurfaceShare. A floor you cannot cross is not a floor.
Web references checked, per his suggestion -- we invented every metric in
this project without once testing them against reality: NPS solution-cave
and Mammoth Cave morphology, Lehman Cave dimensions (Talus Room 90x376 ft,
21,511 sq ft floor, 113 ft ceiling), Deep Rock Galactic cave-design notes,
Team Cherry on Metroidvania maps. They support heterogeneous room+passage
space with branches and shafts -- NOT a universal floor-to-volume target.
So there is no single number to optimise, which is itself worth knowing.
PART B -- Saved/VoxelForge/Showcase/index.html, 8 cards, 64 PNGs, fine
renders (step 1, radius 64, centred on LargestComponentPoint), 0 blanks.
Each card carries the exact PIE values to type in, because navigability is
judged by walking:
CrystalChamber seed 7331 idx 34 slot 1 Maze seed 0 idx 58 slot 1
FlatPlain seed 0 idx 4 slot 1 SurfaceWorld seed 0 idx 11 slot 2
FloatingIslands seed 0 idx 34 slot 1 TunnelNetwork seed 0 idx 61 slot 1
Underwater seed 0 idx 46 slot 1 VerticalShafts seed 0 idx 15 slot 1
All bComposerRollStructure = false. Selection searched seeds 0/7331 x
indices 0-63, applied the three hard gates, then scored
floor_area + .25*clearance + .10*largest_surface.
Caveats kept honest: floor area is a sampled XY proxy, projected
connectivity is not a 3D traversal proof, "best" means best within the
searched range.
Build clean, 30 succeeded / 0 failed, verified by me.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VJiTcTSDNkKBtnNdiBtdaU
Fr0zkaandClaude Opus 5
088b40216d