_getDefaultTextureGPU( format ) {

		let defaultTexture = this.defaultTexture[ format ];

		if ( defaultTexture === undefined ) {

			const texture = new Texture();
			texture.minFilter = NearestFilter;
			texture.magFilter = NearestFilter;

			this.createTexture( texture, { width: 1, height: 1, format } );

			this.defaultTexture[ format ] = defaultTexture = texture;

		}

		return this.backend.get( defaultTexture ).texture;

	}
Returns the default GPU texture for the given format.

@private
@param {string} format - The GPU format.
@return {GPUTexture} The GPU texture.