import * as THREE from 'three';
import type { InstancePlaceFn, PropContext, PropFactory } from '../types.js';
/** Placement options for {@link createInstancedProp}: instance `count`, scatter `radius`, deterministic `seed`, and a custom `place` callback. */
export interface InstancedPropOptions {
    count: number;
    radius?: number;
    seed?: number;
    place?: InstancePlaceFn;
}
/** The instanced field. `dispose()` frees the instanced geometry it owns. */
export interface InstancedPropResult {
    object: THREE.Object3D;
    dispose(): void;
}
/**
 * Scatter one prop as an `InstancedMesh` field: builds a single sample from
 * the factory, then instances its geometry/material `count` times within
 * `radius`. One draw call regardless of count.
 *
 * @param factory - Prop definition; its `instanced` hint merges under `options`.
 * @param options - Count/radius/seed/placement overrides.
 * @param ctx - Prop context (rng, loop).
 * @returns An {@link InstancedPropResult} ready to add to the scene.
 * @remarks Placement is seeded and deterministic. Non-mesh sample roots fall
 * back to per-instance clones grouped under one parent.
 */
export declare function createInstancedProp(factory: PropFactory, options: InstancedPropOptions, ctx?: PropContext): InstancedPropResult;
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