Sunken City and Underwater Ruins

What is placed

A drowned city on the seabed, 60 m by 46 m, walked as one loop. It is deliberately unnamed and the carvings on it are abstract: nothing here is a real place, a real people or a story you already know.

The temple precinct is the first thing you meet. A raised platform carries a colonnade of standing columns with one toppled across the floor between them, drum stacks and broken capitals where the rest came down, relief panels at the far end, a statue base with its torso beside it, and the pediment that spanned the front broken in two. Braziers flank the steps down to the plaza, where cracked paving gives way to a mosaic plate, the sundial plinth, a fountain basin, a well mouth and two obelisks on stepped plinths.

West of the plaza a collapsed street runs between two frontages four metres apart: wall runs intact and fallen, doorway frames, and arch sections whole and broken that you walk under. Behind the west frontage a whole block has come down into rubble, drums and toppled columns. North of the city the ruin thins out into a rubble field of column stumps, a broken arch and the last of the wall line.

East of the plaza the ground falls away to the wreck site: two hull sections, rib sets, mast stumps, a rudder, anchors and chain runs, with waterlogged cargo crates spilled down the slope. The hoard lies between the wreck and the city, a buried chest with its lid, scattered coins and amphorae upright, toppled and piled.

Marine growth is worked across the whole floor rather than gathered into beds: 23 kelp stands, sea fans, three kinds of coral head, anemones, barrel sponges, barnacle crusts, sea grass, urchins, starfish and clams, so no part of the ruin reads as bare silt. Bubble columns, light shaft plates and fish shoal plates are placed as accents, a few of them, never a grid.

534 placements of all 54 models in the pack, about 1.4 MB of GLB in all.

A seabed, not a simulation

The demo viewer walks a ground plane under a sky. It is not simulating water, and nothing here pretends it is: the walk presents the ruins as a walkable seabed floor, and the underwater reading comes from the pack's own content and the scene colouring, the blue green sky and the pale silt ground. A consumer drops these models into their own engine and lights and fogs them as underwater there, with a caustics pass and a water volume this viewer has no way to show. Everything stays at seabed level for the same reason: the walk has no vertical movement, so the standing columns, the obelisks and the arches are silhouette you look up at, never something you swim over.

What moves

Almost nothing, and that is the point. A doorway leaf on the street opens and closes, the treasure chest lid opens, and the crystal clusters on their plinths turn. Three of the 54 models carry clips and all three stand beside the walk. A ruin is a place where the mechanisms have already stopped, so a pack of it having three moving parts is correct rather than an omission: what a consumer wants from these models is silhouette, wear and the way the pieces tile.

What does not move, and why

Kelp, sea fans, sea grass, the bubble columns, the light shafts and the water itself are static geometry. Flexible material, fluid and light each need a joint per element or a shader to move, and neither is reachable with the single rigid node transform this library animates with; a faked version would cost a consumer more than it gives. The pack has no creatures: the urchin, the starfish and the clam are static props, and the fish shoal is a flat decorative plate, not a shoal that swims. There are no people anywhere, because there are no skinned meshes in this library at all.

Every piece here is a published model from the pack, placed by hand. Walk with the keys or touch, and approach a piece to see it move if it has animation. Colliders, navigation and gameplay are yours to add.