import { CubeTexture } from 'three';
interface FisheyePreviewSphereProps {
    /** Distance from camera to preview hemisphere in scene units (meters) */
    previewDistance?: number;
    /** Number of segments for the sphere geometry */
    segments?: number;
    /** Cube texture (environment map) to display on the hemisphere */
    envMap: CubeTexture;
    /** Background color for the preview */
    backgroundColor?: string;
    /** Background opacity (0-1) */
    backgroundOpacity?: number;
}
/**
 * Hemisphere preview that displays fisheye camera render output in the 3D scene.
 * Uses a hemisphere geometry with custom shader to properly display the cubemap
 * as if viewing from inside looking outward (180° FOV fisheye).
 * Set to CAMERA_HELPERS layer so it's only visible to SceneCamera,
 * not to other virtual cameras.
 */
export declare function FisheyePreviewSphere({ previewDistance, segments, envMap, backgroundColor, backgroundOpacity, }: FisheyePreviewSphereProps): import("react/jsx-runtime").JSX.Element;
export {};