WorldPartition, cells and vistas

San Vansterdam’s WorldPartition is a 9,600-metre hierarchy of quadrant subworlds. Agent definitions control which simulation cells and vistas are active around the player; the level’s quadrant data supplies radii when WorldPartition.StreamingRadius* is -1. Observed

Node kind	Count	Nominal cell width	Confidence
Root and persistent	2	Whole level	Observed
Long	42	200 m	Observed
Medium	136	100 m	Observed
Short	459	50 m	Observed
Detail	414	50 m	Observed
Total	1,053	Mixed hierarchy	Observed

The eight measured agent definitions are fullagent, minimalagent, novistas, onlyvistas, nullagent, infinitevistas, marketingagent and infinitelong. Stored fullagent simulation radii are 210/105/60/30 m for long/medium/short/detail. A live Ultra configuration instead reads 230/130/80/60 m: the tier overrides attributes through WorldPartition.AgentFloatAttributeNN paths. Stored data and effective settings are distinct. Observed

San Van’s level, counted as unique manifest rows, has 1,838 bundles, 113,435 EBX documents and 62,149 resources, among them 9,974 Textures, 9,588 MeshSets, 10,107 PhysicsResources and 1,271 ShaderBlockDepots. Observed

Stock textures and depots follow cells: a San Van measurement finds depots in 983 of 1,052 non-root cell entries, covering 26,132 texture entries. Collision also streams, so a visually present destination can still lack collision during a teleport. Observed

StaticModelGroups

Measured cell sublevels use one StaticModelGroupEntityData, with a 176-byte group, 224-byte members and 64-byte transforms. A member names one distinct MeshAsset; measured maxima are 512 members and 2,798 instances. One PhysicsAsset can serve the group at <cell>_sublevel/staticmodelgroup.physics, while render-only groups and members are valid. Observed

A StaticModelGroup consumes at most one spatial cull id per member mesh, rather than one per instance. Instance buffer population does not allocate from the cull-id pool. Observed

Placements

An ObjectReferenceObjectData places a blueprint with BlueprintTransform {right, up, forward, trans}, applied as a row vector: world = x*right + y*up + z*forward + trans. The blueprint import leads to an ObjectBlueprint whose StaticModelEntityData.Mesh imports a RigidMeshAsset; the RigidMeshAsset’s name equals its MeshSet’s name. Observed

Vistas

Vistas represent distant geometry; the fullagent long-vista radius is 10,000 m and vista meshes draw their last LOD. Stock DingoVistaLodGroup has Lod1 at 10,000 m and zero screen-area cull threshold. A measured whole-city vista has about 915,000 triangles. Observed

The stock hierarchy has vista data in 35 of 42 long and 119 of 136 medium cells, about 127 MB in total. Studio-created meshes instead use WorldObject_MediumVista_2Lod, with Lod1 90 m, Lod2 1,000 m, CullScreenArea 0.005 and WpsDistance 4, including its vista proxies. Observed

WorldPartition masks the vista corresponding to each loaded HD cell using 1 << AlternateObjectLayer. The resolve’s mask call is slot +0x80 of the WorldPartition system vtable at Skate+0x65f03d0, and it writes +0x5e/+0x60 of the cell’s top vista entity. An in-game intervention across three positions observes 33 masks; clearing them restores distant slabs above the detailed scene. A far mesh spanning several cells can remain visible over another loaded cell. Observed

Studio’s one-proxy-per-200-m-cell construction can make every proxy resident under the inherited agent rules. A 661-proxy city example occupies 1.94 GB and hangs in G-buffer/decal GPU work. This is distinct from the stock hierarchical vista arrangement. Observed

A Studio level names its vista bundles from its depth-2 QuadrantInfo entries (VistaBundleName); the wpvista bundles themselves are separate entries of the TOC, so emptying the names leaves the bundles in the level. Observed

Pause map and loading screen

A community level’s 2D pause-map assets use ui/reskate/<level>/map/* and ui/reskate/coremap/* in bam_coregameassets. The ECS core prefab imports a MegaPark_CoreMapViewModel instance. Importing the asset root instead faults at Skate+0x1918602. Observed

The coremap framing value is a boxed Vec3: (centre_x, H * 1.1 / (2 * 0.043661), centre_z), where H is map height. Observed

A community level’s loading screen lives in globals bundle win32/ui/foundations/loading/loadscreen/loadscreen_megapark_widget_bundle as ui/reskate/<level>/loadscreen/img_loadscreen (a RimeTextureAsset), the TextureAssets img_loadscreen_2560_1440 and img_loadscreen_1280_720 (format 0x3d, BC3, one mip) and loadscreen_widget; win32/default_settings carries the patched dingoloadscreen_configuration (RimeLoadScreenConfig). A level without its own picture shows a pink and black checkerboard. Observed