Snap in 3D symbols and extrudes

[Hugo]

I am experiencing trouble with snaps in 3D symbols and extrudes. I am drawing a polyline to recreate the section of a column I plan to extrude. This polyline has many vertex and points, it looks similar to a star. While it is a polyline, snaps work perfect. The cursor detects all corners, centers, midpoints and others. I can draw with absolute precision. But once I extrude it, it looses most of it's snap points. Only some vertex work, and I can't snap lines to center points or others.

Do I need to change some preference, or this is the way it works?

[Kaare Baekgaard]

By double-clicking the 'snap to object' tool icon, you can get snap to centerpoints.

[Hugo]

Kaare,

Snap to object is on. That is why I ask.

[Kaare Baekgaard]

I am expressing myself poorly: The 'snap to object' in my experience is almost like 2 tools: By double clicking it, I invoke a dialogue, that enables me to snap to 3D objects and 3D centerpoints. For some reason, however, snapping to 3D cornerpoints becomes more tricky, when this option is 'on'. So I find mtself constantly turning this option on and off.