I’m not sure what’s going on with the extrude command.
When I extrude a curve, I usually want the result to be a polysurface split in the same places where the curve splits when I explode it. My work-around in V5 was to explode the curves first, then extrude (DivideAlongCreases would only work if the continuity between curves was G1, so didn’t work if the continuity happened to be G2 or greater.) But in V6, extruding exploded curves doesn’t give me a surface split like the input. Instead, it seems to give me the same result that I’d get if my curves were joined.
This is also a huge problem and time-suck for me when I use Sweep1 with a single cross-section curve (95% of the time I have one cross-section curve.) I need the output to match the way the cross-section curve is split. Otherwise, I run into nightmares when I try to boolean parts later, or trim & split. I’m not sure I’m explaining it well. In the attached sweep1 file, I want the blue part to stop at the white part. This would be much easier if I had edges on the white part to use to split the top & bottom surfaces of the blue part. I’ve been building a lot of track lately & run into this problem a lot. I have to make sure that every time I sweep1 a shape, I explode it and then split it to match my input curves (otherwise, if I wait until later, I may not have the curves in the file anymore or things may have been moved, so it’s tedious to fix.) It’s very, very time-consuming.extrude.3dm (7.9 MB)
sweep1 no split.3dm (8.3 MB)