Create a Blueprint for a spawner that spawns enemies at random locations within a box volume every few seconds

SpawnEmitterAtLocation — spawn a legacy Cascade particle system

Legacy Cascade system. Prefer Niagara (SpawnSystemAtLocation) for new projects.

Spawn system with wave management for enemies

Pattern: Variables CurrentWave(int)=0, EnemiesAlive(int)=0, EnemiesPerWave(Array<int>). StartWave: CurrentWave++ → SET EnemiesAlive=EnemiesPerWave[CurrentWave]. Timer looping: Branch(SpawnedThisWave < EnemiesPerWave[CurrentWave]) → SpawnActor(EnemyClass, RandomSpawnPoint) → SpawnedThisWave++. OnEnemyDeath: EnemiesAlive-- → Branch(EnemiesAlive <= 0) → StartNextWave or Victory.

SpawnSystemAtLocation — spawn Niagara particle system at location

UNiagaraFunctionLibrary::SpawnSystemAtLocation.

SpawnSystemAtLocation — spawn a Niagara/Cascade particle system

UNiagaraFunctionLibrary::SpawnSystemAtLocation. bAutoDestroy=true for fire-and-forget. Use SpawnSystemAttached to attach to a component.

SpawnActorFromClass — spawn a new Actor into the world

Cast ReturnValue to the specific class to access its properties.

Spawn actor at location with collision handling

Pattern: Trigger → SpawnActorFromClass(Class, MakeTransform(Location, Rotation, Scale), CollisionHandling, Owner) → ReturnValue → IsValid branch → use spawned actor. Always check IsValid on ReturnValue. For many spawns, spread across frames with timer to avoid hitches.

SpawnEmitterAtLocation — spawn particle effect at world location

UGameplayStatics::SpawnEmitterAtLocation. For Niagara, use SpawnSystemAtLocation.

Spawn actor at location with rotation

Pattern: MakeTransform(Location=SpawnLocation, Rotation=SpawnRotation, Scale=(1,1,1)) → SpawnActorFromClass(Class=ActorClass, SpawnTransform=Transform) → CastTo<YourClass>(ReturnValue). SpawnActorFromClass inputs: 'ActorClass', 'SpawnTransform' (Transform), not separate Location/Rotation. Use MakeTransform node to build the Transform struct from Location+Rotation+Scale.

SpawnActorFromClass pin reference — Class SpawnTransform Owner ReturnValue

K2Node_SpawnActorFromClass. Class pin is a class reference dropdown.