import type { PBRMaterial } from "@babylonjs/core/Materials/PBR/pbrMaterial.js";
import type { AbstractMesh } from "@babylonjs/core/Meshes/abstractMesh.js";
/**
 * Prepares the surface variant without touching active submesh draw wrappers.
 * Unlike forceCompilationAsync, this owns and cancels its polling timer.
 * Readiness is not a visual-quality assertion or a check of every shadow pass.
 */
export declare function prepareMaterialSurface(material: PBRMaterial, mesh: AbstractMesh, slot: number, signal: AbortSignal): Promise<void>;
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