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I've been trying to create a topographical wire mesh as shown below to convert to curves later:

enter image description here

Here I have a Bisect Tool Cut in Blender, but as you can see, the Tools panel really doesn't have an option to Create Multiple Cuts like I would want:

enter image description here

enter image description here

But heres an example from Cinema4D below, but I know it's possible in Blender too.

enter image description here

I would then like to select those edges and convert them into splines.

enter image description here

Apologies for the confusion.

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  • $\begingroup$ I am pretty sure, that someone has answered the same question before. Give me some time to search for it. $\endgroup$ – Paul Gonet Sep 12 '16 at 17:08
  • $\begingroup$ @PaulGonet If you can find it, I would greatly appreciated! $\endgroup$ – Art Jr. Sep 12 '16 at 17:17
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    $\begingroup$ @Art Jr. Here you are sir: blender.stackexchange.com/questions/39510/… $\endgroup$ – Paul Gonet Sep 12 '16 at 17:24
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    $\begingroup$ I think this is a case of asking about Y instead of X. You're asking about how to get the knife tool or bisect to do multiple cuts (which is possible), but if you rephrase your question to be more about the effect you want as opposed to the specific tools you want to use I think you will find that there are better solutions than using the knife or bisect. $\endgroup$ – Ray Mairlot Sep 12 '16 at 17:34
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    $\begingroup$ Sverchok has a node to cut slices like the last example, which could then be extruded to get the top image. $\endgroup$ – sambler Sep 13 '16 at 4:34
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Create a plane that is larger than your terrain and create an array in the Z direction. Add a Boolean modifier to the terrain - the plane is used as a cutter. Visually you can create the layers by then adding a solidify modifier...

Array + Contour

...but you asked about creating curves so - apply the Boolean and then in Edit mode press P and choose by loose parts. Back in Object mode while all the objects are still selected press ALTC and convert your meshes to curves.

Contours to curves

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