STEP 47 OF 67 · YOU ARE THE NPC AND AI DESIGNER

Run crowds at scale

Mass AI simulates thousands of people. Nearby people are fully animated; distant ones become cheaper animated meshes.

How to do it

1. Set up Mass Crowd with your variants.
2. Set the distance where people switch to cheaper versions.
3. Unreal 5.8's MetaHuman Collections targets thousands of characters on high-end PCs.

Before you move on

In Duke Forger, this step's gate checks:

• You upload proofScreenshot of the crowd with the frame rate visible

Words to know

Mass AI

Unreal's system for simulating thousands of characters, cars or creatures efficiently.

Crowd

Many NPCs simulated together as a group so thousands can exist at once.

LOD

Level of detail: simpler versions of a model used when it is far away, so the game runs faster.