The curve display is somewhat different though - curves are diced up dynamically to only deviate by less than a pixel on the current view screen, so the curve display automatically refines as you zoom in.

So that means that what you see on your screen for curves is a really accurate representation of the real curve.

Unfortunately there is too much number crunching work involved in doing that same dynamic refinement process on shaded surfaces, so a surfaces are only broken down to a static set of triangles one time and do not automatically refine as you zoom in. So that's why it is not unusual or an "error" to see some evidence of the triangulation process in the shaded surface display. When you see some slight angularity and it does not look like it is strangely leaking outside of bounds or looks like really scrambled colors (those types of things can be evidence of trim curve problems or self intersections), then you're just seeing some of the silhouettes that the display mesh is made up of. That's nothing to worry about - it's a normal part of the display.

- Michael