Hi. I follow a vellum tutorial in which scattered spheres are pinned to a Geometry and inflated afterwards.
Do you know what could be causing oscillating effects on the spheres? I can share the file if that helps.

<div style="position: relative; padding-bottom: 56.25%; height: 0;"><iframe id="js_video_iframe" src="https://jumpshare.com/embed/rioiSLrz44pXY4cd4xVP [jumpshare.com]" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen style="position: absolute; top: 0; left: 0; width: 100%; height: 100%;"></iframe></div>

This tutorial might help.
https://www.sidefx.com/tutorials/stabilize-a-chaotic-vellum-cloth/ [www.sidefx.com]