Hello,
On my current project, I am attempting to remain Affinity software as much as possible, however, I ran into another task where I am glad I kept that copy of PS CS6 installed.
In this current attachment, you'll see another example of why a "puppet" warp-like feature would be very valuable for solving design tasks like these.
Please consider adding this feature to the roadmap or a similar "pins/tacks" to the liquify… this would be faster and more predictable than dealing with the whole thaw/freeze brushing operation. Thank you.