Hi anthony, I had previously looked at Parasolid, Kubotek KCM, and C3D.

The difficulty I had with Parasolid was that it was very strict about what geometry it would accept. It would refuse to create a closed surface if it was something like 1 degree off from being smooth. This was a problem because of the particular way I wanted to integrate it which is in some gradual stages instead of everything changing over all at once.

Also the other problem with it is that it's expensive and very "enterprise" big business oriented.

KCM and C3D were offering much friendlier terms for small businesses so those could be a better fit. I waited on KCM for a pretty long time but it seems to have stalled out. Next, just as I was about to dig into C3D the Russia/Ukraine war broke out and C3D is developed by a Russian company. It's pretty much impossible to do business with a Russian company now so that one was off the table too.

That left ACIS as the last viable one to try. I had not previously tried it because it is also pretty big business oriented although not to the same extent as Parasolid.

In my initial tests I found that I was able to round trip geometry into and back out of it again very well so I decided to move forward using it.

- Michael