Left: Using a UI button for checking all curves:
Right: Checking surface and polysurface [ATT: YOUR POLYSURFACE WILL EXPLODE]
; I'm not able to undo, so you need to press Ctrl Z 3 times
It can be very useful if implemented visually so that we do not has to inspect each surface manually.
As for example a simple option to display control points in red if they are to close to each other.
Can be cpu intensive but can be calculated not often when curve or surface are been modified and in a separate process thread cpu core.
Or include it inside ‘! _Check’?