Create a Blueprint for a simple elevator that moves between two floors when a button is pressed

Level

A scene containing actors, lighting, geometry. Open a level via Open Level. Sublevels stream in/out.

Elevator or moving platform with timeline and trigger

Pattern: Variables StartLocation(Vector), EndLocation(Vector). BeginPlay: SET StartLocation=GetActorLocation. Timeline MoveTimeline(Alpha 0→1 over Duration). Trigger overlap/button press → Play Timeline. Timeline Update: VLerp(StartLocation, EndLocation, Alpha) → SetActorLocation(Self, Result, bSweep=true). Finished: Delay → Reverse Timeline.

Create a Blueprint for a door that opens when the player overlaps a trigger and closes when they leave

Level transition with loading screen

Pattern: CreateWidget(WBP_LoadingScreen) → AddToViewport(ZOrder=100) → LoadStreamLevel or OpenLevel(NewMapName). For async: AsyncLoadLevel → OnCompleted → RemoveFromParent(LoadingWidget). Store persistent data in GameInstance before transition. Use Seamless Travel for multiplayer.

Create a Blueprint for a health pickup that restores health when overlapped by the player

Sublevel

A child level streamed in/out of a persistent level. Used for open-world streaming and modular maps.

Vertical Box

Lays out children top-to-bottom. Children's Size pins control how space is distributed.

OpenLevel — load a new level by name

bAbsolute=true reloads from scratch. LevelName is the map asset name without path.

string

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