Custom maps for MECCHA CHAMELEON

MECCHA CHAMELEON (Unreal Engine 5.6.1, project Chameleon) is built to load user maps. Its install ships the plugins SteamWorkshopMaps, Mod.io-Main, Mod.io-UGC and Mod.io-UI beside the engine’s own, in the build’s file manifest. Observed · MECCHA A map reaches the game as a cooked content package built against the game’s own release. Observed · MECCHA

The official mod kit

The developer publishes a mod kit, MecchaCModKit_Load.zip: a stock Unreal Engine 5.6 project that includes a cooked reference map (SampleMyUGC). Observed · MECCHA

What a map is

A map is a content-only plugin: one World Partition level (with streaming off) in Plugins/<P>/Content/Maps, using stock StaticMeshActors and lights only. Observed · MECCHA

Requirement	Value	Confidence
actors	stock StaticMeshActors and lights; no game-specific actor classes	Observed · MECCHA
collision profile	CameraBlockWall (a channel named CameraWall)	Observed · MECCHA
UV lookup from hits	bSupportUVFromHitResults=True in the project settings	Observed · MECCHA
Nanite	off	Observed · MECCHA
lighting	Lumen with ray tracing	Observed · MECCHA
spawn	fixed at the origin: (0, 0, 100) in the kit’s first release and (0, 0, 0) after a game update	Observed · MECCHA

The spawn height

The kit places the player at the origin at height 100, and after a game update at height 0; which of the two the game uses, and whether the level can set its own start, is unresolved.

Packaging

The kit is cooked with the Project Launcher in its legacy form: first a FullGame profile with release version 1.0 (the base the DLC is built against), then a DLC profile for the plugin. Observed · MECCHA The command-line equivalent is RunUAT BuildCookRun with -DLCName=<plugin> and -basedonreleaseversion=<release>. Sourced · Unreal Engine documentation

What is shipped, per map, is <P>MecchaCModKit_Load-Windows.pak, .ucas and .utoc (an IoStore container beside a small pak), AssetRegistry.bin and Preview.png, uploaded through SteamCMD as a Steam Workshop item. Observed · MECCHA The map’s .utoc and the game’s use the same table-of-contents version, 8, and container flags 0x09: unencrypted, unsigned (IoStore containers). Observed · MECCHA

For a local test the cooked files overwrite the item’s folder under the Steam install: steamapps/workshop/content/4704690/<item id>/. Observed · MECCHA

Importing meshes

Unreal’s Interchange pipeline imports glTF into a level through a headless editor script (import_scene, with the level pipeline creating actors and materials imported as material instances of a chosen parent material). Sourced · Unreal Engine documentation Collision comes from mesh name prefixes UBX_, UCP_, USP_ and UCX_ (box, capsule, sphere, convex). Sourced · Unreal Engine documentation