export interface ThreeCompatPMREMPreset {
    readonly faceSize: number;
    readonly mipCount: number;
    readonly cacheKey: string;
}
export interface ThreeCompatPMREMDiagnostics {
    readonly cacheKey: string;
    readonly faceSize: number;
    readonly mipCount: number;
    readonly estimatedBytes: number;
    readonly warnings: readonly string[];
}
export declare function createThreeCompatPMREMDiagnostics(pmrem: ThreeCompatPMREMPreset, format: string): ThreeCompatPMREMDiagnostics;
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