I'm trying to create a nosecone in the spline modeller but I notice some render artifacts at the tip of the nose (shown) and also at the back (not shown). I tried upping the Geometry/Surface Fidelity but that didn't seem to help. I also checked to make sure that the setting on the torus preset matched the height of the back edge of my cross-section spline (which was imported from AI).

I really don't have a solution to your problem, but did you think about making the nose cone in the spline modeller without using the torus function. I believe a symmetrical profile would give you the same effect off a circular base. Just a thought, not certain what your end goals is. memaci

I get those artifacts when the Illustrator file has "corner points", i.e. points with no Bezier "legs" to make sure the curve is integral in both slope (1st derivative) and "flip" (2nd derivative).

Hi, you should try to contact our tech support at support@eovia.com. If we are not able to help, we should at least be able to make sure this is fixed in the next version of Carrara Charles

Thanks for the suggestions (although so far I haven't been able to completely solve the problem) and also I just sent my file off to eovia tech support.

One thing I notice in Illustrator is that my points only have one handle, not two (but not sure what that means or even how to change it). I created my shape by laying down a circle, stretching it 50% in one direction and then deleting 3/4's of the circle.

There's 1 corner point in the lower right. It looks like you'd get those artifacts from the points in the upper right and lower left.

they only have one handle because the bottom and right edges are straight, so they have no handle -dthrm