Hi Pilou,

> I must make the intersection first for have a point!

Yes, that's correct - you could either boolean or trim those surfaces to create an edge there, or you could use Construct / Curve / Isect to create intersection curves between them.

It's not really feasible to do an automatic surface/surface intersection for snaps, it is just too slow and processor intensive to attempt to do it between all surfaces automatically. It would make for very slow interaction while you were trying to draw.

- Michael

I Understand :)

>> So thanks for reporting it, you can see an even more striking instance of this same bug if you draw a cylinder, rotate it around to an odd angle, then delete the planar end caps and draw a circle snapped on to the edge's center in that case. Since the closest point to the cylinder is way far off it is a more noticeable effect. It was kind of masked previously because it was handled fine if the cylinder caps were in place.

Ok, happy (if I can say) to find this one :)