import { Camera, WebGLRenderTarget } from 'three';
interface UseLegacyCameraPreviewOptions {
    /**
     * The camera key (for reference only, not used for store operations)
     */
    cameraKey: string;
    /**
     * The Three.js camera instance
     */
    camera: Camera;
    /**
     * The WebGLRenderTarget to render to (from useFBO)
     */
    renderTarget: WebGLRenderTarget;
    /**
     * Enable or disable preview rendering.
     * When false, the render target exists but is not updated.
     * @default true
     */
    enabled?: boolean;
}
/**
 * Legacy hook for camera preview rendering using standard WebGL rendering.
 *
 * This is the fallback mode when useViewpoint=false. It uses gl.render() directly
 * to a WebGLRenderTarget, which does NOT support 3DGS (Gaussian Splatting) content.
 *
 * For proper 3DGS support, use useCameraPreview with SparkViewpoint instead.
 *
 * @example
 * const renderTarget = useFBO(width, height, { samples, depthBuffer });
 * useLegacyCameraPreview({
 *   cameraKey: 'cam1',
 *   camera,
 *   renderTarget,
 *   enabled: previewInScene || previewInOverlay,
 * });
 */
export declare function useLegacyCameraPreview({ cameraKey, camera, renderTarget, enabled, }: UseLegacyCameraPreviewOptions): void;
export {};