I could probably point out a couple bugs in ACIS shell also if you are digging into that part and want/ready to hear.....

Just reproducing Toms object with a sphere can lead into a couple that may point to something....

Create a sphere of radius 12. Stretch it down with edit frame to look like Tomes object. Shell it 1 inch. Try to cut it in half with a Boolean diff line front plan. Spin 180 same result. Spin 90 cuts.

Delete outer shell with a drill down selection before spinning. cut solid in half. Attempt 1 inch shell on half.

Hi Tom, can you please send me the .3dm model file with those objects?

- Michael

Sure. :)

By the way, It is amazing how many new capabilities you always manage to bring us! Thank You!

Tom

Here is a sample file. It shows Solid, Shell ACIS & Shell Solid++ and includes cut versions of the shelled samples.

NOTE: I had not seen the artifacts produced by cutting the Solid++ version until preparing this file for you. Up to this point the cuts were performed cleanly. I left them in so that you could assess what might be happening.

Thanks Tom, it looks like there are a couple of tuneups needed for conversion to/from ACIS geometry when there are internal void regions.

I'm investigating.

- Michael