diff --git a/src/runtime-three/navigation-controller.ts b/src/runtime-three/navigation-controller.ts
index a9e611de..508d0334 100644
--- a/src/runtime-three/navigation-controller.ts
+++ b/src/runtime-three/navigation-controller.ts
@@ -9,15 +9,26 @@ export interface FirstPersonTelemetry {
   feetPosition: Vec3;
   eyePosition: Vec3;
   grounded: boolean;
+  locomotionState: RuntimeLocomotionState;
+  inWaterVolume: boolean;
+  inFogVolume: boolean;
   pointerLocked: boolean;
   spawn: RuntimeSpawnPoint;
 }
 
+export type RuntimeLocomotionState = "grounded" | "swimming" | "flying";
+
+export interface RuntimePlayerVolumeState {
+  inWater: boolean;
+  inFog: boolean;
+}
+
 export interface RuntimeControllerContext {
   camera: PerspectiveCamera;
   domElement: HTMLCanvasElement;
   getRuntimeScene(): RuntimeSceneDefinition;
   resolveFirstPersonMotion(feetPosition: Vec3, motion: Vec3, shape: FirstPersonPlayerShape): ResolvedPlayerMotion | null;
+  resolvePlayerVolumeState(feetPosition: Vec3): RuntimePlayerVolumeState;
   setRuntimeMessage(message: string | null): void;
   setFirstPersonTelemetry(telemetry: FirstPersonTelemetry | null): void;
 }