/**
 * Poly Haven gltf dependency resolution.
 *
 * Poly Haven's glTF files reference their textures RELATIVELY ("textures/x.jpg")
 * but the files are NOT served at those relative locations — the real urls live in
 * the asset's `include` map on their files API (e.g. the 1k gltf's textures live
 * under ".../Textures/jpg/1k/…" and the shared .bin under the 8k folder). This is
 * their published standard: consumers are expected to resolve dependencies through
 * the API's include map, not by relative resolution.
 *
 * The loader chain consults this module whenever a glTF is loaded FROM
 * dl.polyhaven.org, so Poly Haven content works wherever the engine runs (a
 * deployed app loading a project document that references a Poly Haven material —
 * no host/editor involvement, same behavior as the Needle editor).
 */
/** true for gltf/glb urls served from Poly Haven's file CDN */
export declare function isPolyhavenGltfUrl(url: string): boolean;
/**
 * Resolver for a Poly Haven gltf's dependency urls (textures, .bin), from the
 * asset's `include` map on the files API. Null when the asset can't be found or
 * the API is unreachable — the caller falls back to plain relative resolution
 * (which will 404, but that is Poly Haven's failure surface, not ours).
 */
export declare function getPolyhavenResolveUrl(sourceUrl: string): Promise<((url: string) => string) | null>;