Hi Alberto,

In answer to your questions 1& 2. It seems it is no longer necessary to commence progression with 0.001.
This a hang over from an earlier version of isoCrvs, as you can see in image below it now does it automatically,
so that's good to know.



Question 3..the info box node ascertains whether the idxSelected surface has a z dimension.
An output of 0.00 for bottle base translates as boolean false and hence breaking the circuit,
while and other dimension translates as true.
It works better with inclusion of blue nodes in attached

I have only just awoken, so I have not had a look at your file. I'll do that now,

I've had a look: Yes your added nodes could be useful, thanks for that

Have a great weekend

James