Why is there no warning that a trim removes the Subd object?

Rhino SubD
1

You get a warning when history is broken, but not when Subd objects are broken?

I’ve never used Subd in Rhino before and luckily I didn’t ruin too my of my work, but it was still a surprise. Regular objects can at least hold one level of trim in its active history!

Also, I long for the day when history can stack in Rhino…

2

Hello- can you explain what you mean by this? I don’t know what it means when a subD object is ‘broken’. What are the steps you take and what do you expect to happen?

-Pascal

3

When an open or closed SubD object is trimmed or split it converts all geometry to NURBS.