Variation in pressure/constraints?

So ive been trying to get my head around how this person was able to get these variations in inflation, I assume they’ve done this in grasshopper/kangaroo but my trials so far have been some what unsuccessful. Imitation (20.4 KB)
image image
They show the points they used to construct the mesh which ive used for this trial. (sorry for image quality its quite zoomed in)

Ive played around with modifying edge lengths depending on their respective lengths but have had little success, and also tried dynamic weighting which gave some interesting results but was again not what they achieved.

First: no attempt of variation Second: Variable edge lengths Third: Dynamic weighting
This is their project.

Any response would be much appreciated, thanks!