import { NodeMaterial } from 'three/webgpu';
import type { Storage3DTexture } from 'three/webgpu';
/**
 * Material for rendering individual slices/layers of 3D SDF textures.
 *
 * Visualizes signed distance values as color (red = inside, green = outside).
 * Supports both single-layer and grid-of-layers display modes.
 *
 * **Display Modes:**
 * - **Single Layer**: Shows one Z-slice of the SDF volume
 * - **Grid**: Shows all Z-slices arranged in a square grid
 *
 * **Color Encoding:**
 * - Red channel: negative distances (inside volume)
 * - Green channel: positive distances (outside volume)
 *
 * @example
 * import { RenderSDFLayerNodeMaterial } from 'three-blocks/sdf-raymarching';
 * import { FullScreenQuad } from 'three/examples/jsm/postprocessing/Pass.js';
 *
 * const material = new RenderSDFLayerNodeMaterial(sdfTexture);
 * const quad = new FullScreenQuad(material);
 *
 * // Single layer mode
 * material.fragmentNode.parameters.layer.value = 32;
 * material.fragmentNode.parameters.grid_mode.value = false;
 * quad.render(renderer);
 *
 * // Grid mode (all layers)
 * material.fragmentNode.parameters.grid_mode.value = true;
 * quad.render(renderer);
 *
 * @class RenderSDFLayerNodeMaterial
 * @extends {NodeMaterial}
 */
export declare class RenderSDFLayerNodeMaterial extends NodeMaterial {
    /**
     * Create an SDF slice-debug material for a 3D storage texture.
     *
     * @param {THREE.Storage3DTexture} sdfTexture - 3D SDF texture to visualize
     */
    constructor(sdfTexture: Storage3DTexture);
}