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HTML 

              
                <div class="c-fluid-reveal">

	<div class="c-fluid-reveal__inner">

		<div class="c-fluid-reveal__item">
			<svg class="c-fluid-reveal__item-media" viewBox="0 0 800 1000">
				<image opacity="1" mask="url('#mask-1')" preserveAspectRatio="xMidYMid slice" href="https://images.unsplash.com/photo-1615737005632-21755eed35e1?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxleHBsb3JlLWZlZWR8OXx8fGVufDB8fHx8&auto=format&fit=crop&w=800&q=60" height="100%" width="100%" />

				<mask id="mask-1">
					<path id="wobble-1" class="c-fluid-reveal__wobble" d="M53.48-414.83C-36.82-373-33.76-278.17-19.91-194c12.17,74,66.56,136.46,2.05,205.61s-109.6,66-153.69,147.16,31,143.15-55,230.15-274,14.62-267,206S-750.66,726.14-680.2,819.76c75,99.68,487.9,207.62,632,282.55,342.19,177.9,764,148.24,902.86-42.68C994.14,867.89,1031.26,327.21,819.11-35.12,647.45-328.3,300.19-406.44,276.48-428.27,223.48-477.07,92.55-432.94,53.48-414.83Z" fill="white" />
				</mask>
			</svg>
			<div class="c-fluid-reveal__content">

				Content
			</div>
		</div>

		<div class="c-fluid-reveal__item">
			<svg class="c-fluid-reveal__item-media" viewBox="0 0 800 1000">
				<image opacity="1" mask="url('#mask-2')" preserveAspectRatio="xMidYMid slice" href="https://images.unsplash.com/photo-1615538622919-b9949998690d?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxleHBsb3JlLWZlZWR8OHx8fGVufDB8fHx8&auto=format&fit=crop&w=800&q=60" height="100%" width="100%" />

				<mask id="mask-2">
					<path id="wobble-2" d="M53.48-414.83C-36.82-373-33.76-278.17-19.91-194c12.17,74,66.56,136.46,2.05,205.61s-109.6,66-153.69,147.16,31,143.15-55,230.15-274,14.62-267,206S-750.66,726.14-680.2,819.76c75,99.68,487.9,207.62,632,282.55,342.19,177.9,764,148.24,902.86-42.68C994.14,867.89,1031.26,327.21,819.11-35.12,647.45-328.3,300.19-406.44,276.48-428.27,223.48-477.07,92.55-432.94,53.48-414.83Z" fill="white" />
				</mask>
			</svg>
			<div class="c-fluid-reveal__content">

				Second Content
			</div>
		</div>

		<div class="c-fluid-reveal__item">
			<svg class="c-fluid-reveal__item-media" viewBox="0 0 800 1000">
				<image opacity="1" mask="url('#mask-3')" preserveAspectRatio="xMidYMid slice" href="https://images.unsplash.com/photo-1615395885697-59118a3c6018?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxleHBsb3JlLWZlZWR8MTc4fHx8ZW58MHx8fHw%3D&auto=format&fit=crop&w=800&q=60" height="100%" width="100%" />

				<mask id="mask-3">
					<path id="wobble-3" d="M53.48-414.83C-36.82-373-33.76-278.17-19.91-194c12.17,74,66.56,136.46,2.05,205.61s-109.6,66-153.69,147.16,31,143.15-55,230.15-274,14.62-267,206
																											S-750.66,726.14-680.2,819.76c75,99.68,487.9,207.62,632,282.55,342.19,177.9,764,148.24,902.86-42.68C994.14,867.89,1031.26,327.21,819.11-35.12,647.45-328.3,300.19-406.44,276.48-428.27,223.48-477.07,92.55-432.94,53.48-414.83Z" fill="white" />
				</mask>
			</svg>
			<div class="c-fluid-reveal__content">

				Third Content
			</div>
		</div>

	</div>

</div>

<footer>
	based on the mask demo by
	<a href="https://codepen.io/cassie-codes">cassie</a> <br>
	see also: cuberto, codrops gl-transitions
</footer>
!

CSS 

              
                .c-fluid-reveal {
	--fluid-reveal-section-height: 140vh;
	height: calc(var(--fluid-reveal-section-height) * var(--items));
}

.c-fluid-reveal__inner {
	display: block;
	min-height: 100vh;
	width: 100%;
}

.c-fluid-reveal__item {
	align-content: center;
	display: grid;
	grid-auto-flow: column;
	grid-gap: 2rem;
	grid-template-columns: 1fr 1fr;
	grid-template-rows: 1fr;
	margin: 0;
	position: absolute;
	top: 0;
	width: 100%;
}

.c-fluid-reveal__item-media {
	display: block;
	max-height: 80vh;
	margin-top: 10vh;
	overflow: hidden;
	top: 0;
	width: 100%;
}

.c-fluid-reveal__content {
	align-content: center;
	background: white;
	display: grid;
	grid-column: 2 / span 1;
	//justify-content: center;
	max-height: 100vh;
	will-change: opacity, transform;
}

// demo styles

@import url("https://fonts.googleapis.com/css2?family=Dela+Gothic+One&display=swap");

body {
	font-family: "Dela Gothic One";
	font-size: 200%;
	height: 900vh;
	margin: 0;
	padding: 0 2rem;
}

footer {
	text-align: center;
}

a {
	color: #f75b7c;
	//text-decoration: none;
}
!

JS 

              
                // get elements, nodelist to array
let fluidRevealEls = gsap.utils.toArray(".c-fluid-reveal__item");

// set variable for wrapper height using css calc
let wrapper = document.querySelector(".c-fluid-reveal");
wrapper.style.setProperty("--items", fluidRevealEls.length);

let animateDuration = 2;
let pinDuration = 5;

let wobble;
let content;
let media;
let tl;

ScrollTrigger.saveStyles([
	".c-fluid-reveal__item .c-fluid-reveal__wobble",
	".c-fluid-reveal__item .c-fluid-reveal__media",
	".c-fluid-reveal__item .c-fluid-reveal__content"
]);

ScrollTrigger.matchMedia({
	// desktop
	"(min-width: 800px)": function () {
		//ScrollTrigger.refresh();
		console.log("dt");
		tl = gsap.timeline({
			ease: "none",
			scrollTrigger: {
				trigger: wrapper,
				start: "top top ",
				pin: true,
				end: "bottom bottom",
				scrub: 0.4,
				markers: true
			}
		});

		let count = 1;

		fluidRevealEls.forEach((el) => {
			wobble = el.querySelector("path");
			media = el.querySelector(".c-fluid-reveal__media");
			content = el.querySelector(".c-fluid-reveal__content");

			if (count > 1) {
				tl.from(
					wobble,
					{
						duration: animateDuration,
						xPercent: 100,
						yPercent: 100
					},
					"-=" + animateDuration
				);
			} else {
				tl.from(wobble, {
					duration: animateDuration,
					xPercent: 100,
					yPercent: 100
				});
			}

			tl
				.from(
					content,
					{
						duration: animateDuration,
						opacity: 0,
						yPercent: 100
					},
					"-=" + animateDuration
				)
				.to(el, {
					duration: pinDuration
				});
			if (count < fluidRevealEls.length) {
				tl.to(
					content,
					{
						duration: animateDuration,
						opacity: 0,
						yPercent: -100
					},
					"-=" + animateDuration
				);
			}
			count++;
		});
	},
	"(max-width: 800px)": function () {
		if (tl) {
			tl.kill();
		}
		console.log("mb");
	}
});
!
999px

Console