I have looked all over for an answer to this, but how do you make the boundary of a section/div a curve/wave shape? I have the following boundary shape in my Figma design right now:
If it helps, the CSS for the wave shape is:
position: absolute;
width: 6302px;
height: 5483.65px;
left: calc(50% - 6302px/2 + 1266px);
top: 59px;
background: #FFFFFF;
box-shadow: -4px -4px 30px rgba(0, 0, 0, 0.1), 4px 4px 30px rgba(0, 0, 0, 0.1);
Thanks!
Hi Alexander 
Welcome to the forum 
If your shape does not have any functional necessity, then it does not have to be a boundary, but a simple background. In this case you can upload an SVG file and use it as a background for any div positioned correctly.
However, if that shape must have a functionality (actually be the boundary with overflow:hidden) then it can’t be done without custom code.
:before & :after: Wavy shape with CSS - Stack Overflow