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HTML 

              
                <body>
  <trigger id="trigger_beach"/>
  <div id="scene_beach">
	<div class="water"></div>
	<div class="sky"></div>
	<div class="beach">
    <!-- the normal palm leans right-->
		<div class="palm1">unflipped</div>
     <!-- the flipped palm leans left-->
    <div class="palm2 flip intended">SIHT TNAW</div>
     <!-- the none of this works: css transform -->
		<div class="palm2 flip scale">transform+scale</div>
		<div class="palm2 flip usingset">set</div>
    <!-- the none of this works: matrix transform -->
		<div class="palm2 flipm scale">matrix+scale</div>
		<div class="palm2 flipm usingset">set</div>
		<div class="palm2 noflip usingset right">no-css + set</div>
		<div class="beach1"></div>
		<div class="beach2"></div>
	</div>
  </div>
	<div class=""></div>

</body>
!

CSS 

              
                body{
	padding: 0;
	margin: 0;
	height: 180vh;
	background: #7dffd7;
	background: aqua;
}
div [id^=scene_]{
	width: 100%;
	height: 100%;
}
div [id^=scene_] > div{
	position: absolute;
}

.beach {
    width: 100%;
	
}
.beach1 {
    width: 100%;
    height: 20vh;
    background: linear-gradient(#F1EEDF,#F3E7C6);
    border-radius: 70% 50% 0 0;
	box-sizing: border-box;
	box-shadow: 0 0 15px 16px aqua;
}
.beach2 {
    width: 100%;
    height: 80vh;
    background: linear-gradient(#F3E7C6,#D2B279);
}
.water {
    width: 100%;
    height: 95vh;
    background: linear-gradient(royalblue 55%,aqua);
}
.sky {
    width: 100%;
    height: 60vh;
    background: linear-gradient(royalblue,skyblue);
	border-bottom: 1px solid #4dbdec;
}
.palm1,
.palm2 {
    width: 10vw;
    height: 63vh;
    background: url("https://media.istockphoto.com/photos/green-palm-tree-leaf-with-isolated-on-white-clipping-path-picture-id157439518") 100% 100%/contain no-repeat;
    position: absolute;
    top: -50vh;
  border: 1px solid
}

.flip {
	transform: scaleX(-1);
}
.flipm {
	transform: matrix(-1, 0, 0, 1, 0, 0);
}
.right {
	right: 0;
}

.intended{
  left: 15vw;
}
.flip.scale{
  left: 30vw;
}
.flip.usingset{
  left:45vw;
}
.flipm.scale{
  left: 60vw;
}
.flipm.usingset{
  left:75vw;
}
!

JS 

              
                //$(function () { // wait for document ready
			// init
			var controller = new ScrollMagic.Controller();
			// create scene to pin and link animation
			new ScrollMagic.Scene({
					triggerElement: "#trigger_beach",
					triggerHook: "onLeave",
					duration: "100%"
				})
				.setPin("#scene_beach")
				.setTween(new TimelineMax()// define movement of panels
					.fromTo("div.beach",	1, {y:"0%"}, {y: "80%", ease: Linear.easeNone}) // comes down
					.fromTo("div.water",	3, {y:"-100%"}, {y: "0%", ease: Linear.easeNone}) // in from top
					.fromTo("div.sky",		5, {y:"-100%"}, {y: "0%", ease: Linear.easeNone}) // in from top
					.add([
        //intended behaviour
						TweenMax.from("div.palm2.intended",	1, {y:"2%",x:"30%",height:"60vh",width:"12vw", ease: Linear.easeNone}),
        //using scale
            TweenMax.from("div.palm2.scale",	1, {y:"2%",x:"30%",scale:"0.5", ease: Linear.easeNone}),
        //suggested fix by GSAP admin using set(scale)
						TweenMax.set("div.palm2.flip.usingset", {scaleX:-1}),
						TweenMax.from("div.palm2.flip.usingset",	1, {y:"-2%",x:"-30%",scale:"0.5", ease: Linear.easeNone}),
        //suggested fix by GSAP admin using set(matrix)
						TweenMax.set("div.palm2.flipm.usingset", {matrix:"-1, 0, 0, 1, 0, 0"}),
						TweenMax.from("div.palm2.flipm.usingset",	1, {y:"-2%",x:"-30%",scale:"0.5", ease: Linear.easeNone}),
        //not using css to flip at all & using set(scale)
            TweenMax.set("div.palm2.noflip.usingset", {scaleX:-1}),
            TweenMax.from("div.palm2.noflip.usingset",	1, {y:"-2%",x:"-30%",scale:"0.5", ease: Linear.easeNone}),
					])
					.fromTo("div.beach1",	1, {borderTop: "0px solid white"}, {borderTop: "20px solid white", ease: Linear.easeNone}) // waves
					.fromTo("div.sun",		1, {y: "-110%",x: "110%"}, {y: "0%",x:"0%", ease: Linear.easeNone})
        )
.addTo(controller);
//});
!
999px

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