Method updateLUTPreview

demo/src/demos/ColorGradingDemo.js:372–396

()

		img.addEventListener("load", () => URL.revokeObjectURL(objectURL));

		function updateLUTPreview() {

			if(params.lut["show LUT"]) {

				// This is pretty fast.
				const lut = LookupTexture3D.from(lutEffect.getLUT());
				const { image } = lut.convertToUint8().toDataTexture();
				const rawImageData = RawImageData.from(image);

				// This takes a while if the image is large.
				rawImageData.toCanvas().toBlob((blob) => {

					objectURL = URL.createObjectURL(blob);
					img.src = objectURL;
					img.classList.remove("hidden");

				});

			} else {

				img.classList.add("hidden");

			}

		}

		function changeLUT() {