Lag during roof editing in X6

[Steve C.]

Try turning off Auto Rebuild Walls/Floors/Ceilings in 3D View Defaults - I think that's what the dbx is telling you.
You will then have to rebuild manually though.
You could also make sure you don't have any of the auto framing options toggled on.

I think the only reason you see the message on large plans is that it takes so long to rebuild.
The message probably still pops up with smaller plans, but it's so fast, you don't notice it.

This speeds things up a bit but in 3D you can't see what you've done without rebuilding. It is more helpful in plan view, which is strange because I don't even have a 3D window open. From a software design standpoint, it seems like they could get 3D items to individually rebuild instead of having the entire model do so. Guess I'm a little naive about such things.