cement map on the THREE side
			const displacementCanvas = document.createElement('canvas');
			// Used to overlay markers indicating a region will change, and to allow rendering of original SVG even after modified
			const visibleTextureCanvas = document.createElement('canvas');

			let displacementContext2D;
			let visibleCanvasContext2d;

			function heightFieldFromSVGl(svg, x, z) {
				// Extract the image data from the canvas
				const canvas = displacementCanvas;
				const ctx = displacementContext2D;