Hi max,

> This situation. I would like to know if it's possible to use Extend even if the lines are not complanar.

For that particular situation you show there, you can use Trim which does have an option for "Project intersections" which will do that job.

Extend does not currently have an option for doing apparent intersections, it would make sense for it to have it as well though, I'll take a look at adding it.

- Michael