Questions tagged [knife-tool]

The Knife Tool cuts new edges into meshes, adding vertices to user-defined points regardless of existing topology. The Knife Project Tool projects the topology of one object onto another, using the current view angle. Use this tag for questions pertaining to the Knife Tool and the Knife Project Tool.

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68
votes
4answers
159k views

How would you cut a shape out of an object using another object?

Coming from SketchUp one of the tools I miss most is the circle draw tool which lets you draw a circle on any face and then you could extrude it in/out. The only tool that I know of that comes close ...
51
votes
5answers
143k views

Cutting a mesh in half

I have a mesh which I have imported from an OBJ file. I would like to apply Material A to the section of the mesh which is on one side of a given plane, and apply Material B to the section of the mesh ...
15
votes
1answer
48k views

How to connect faces between 2 edge loops?

I'm trying to fill empty space in my mesh, and I looked at the knife tool page on the Blender Wiki, and I'm not sure if there's a way to make it so that a new edge is made using the knife tool. I took ...
10
votes
2answers
4k views

Knife tool doesn't cut obscured edges

I'm using Blender 2.66, I find that the knife tool (K) doesn't work the way it used to. Dragging across an obscured edge, even if selected, doesn't cut it. There seems to be no way to activate the ...
10
votes
2answers
2k views

Is there any way to get a specific angle using the knife tool?

Instead of the constrained 45 degrees that happens when you press C, is there a specific angle I can get for example 35 degrees instead? It's currently cut at 45 degrees in the attached image and I ...
3
votes
2answers
346 views

What is the best way to model the intersection of multiple hard-surface pieces?

What is the best way to model the intersection of multiple hard-surface objects? Not technically different "objects" persay - but where different pieces meet visually. What are various ways of ...
6
votes
2answers
3k views

How to cut a mesh by specifying the angle [duplicate]

I wanna cut a mesh by specifying the angle, but knife mode only cut 45° with C key. I want to cut by the angle around specifying the vertex.
2
votes
1answer
768 views

What's the most elegant way to cut shapes out of a mesh?

I'm trying to cut shapes out of a mesh, but I'm having trouble doing it, or at least doing it properly. I'm currently trying to model this flashlight: The part I'm specifically having trouble with ...
2
votes
1answer
547 views

Blender knife tool options

So I'm 3d modeling a logo and there's one oddly shaped part that needs to be extruded. I am trying to use the knife tool to cut it out, but every time I finish it deletes the face. In the operator I ...
33
votes
2answers
38k views

Cut straight lines with knife tool

How can I get the knife tool to snap to the same spot on another edge to get a straight cut. Here is an example of what I want to do: When the line turns green the cut is straight. How can I do this ...
2
votes
2answers
1k views

Slice up terrain mesh into chunks

I have terrain (ANT Landscape plugin) that I would like to cut up into chunks (don't need to be equal size) for a game engine so that I can do occlusion culling / or load and unload chunks around the ...
6
votes
1answer
488 views

How do I get knife_project operator to use view settings within the operator?

I have coded an Operator that tries to change the view to Top using bpy.ops.view3d.viewnumpad, and then the ...
3
votes
1answer
866 views

Why does knife project cut only one hole into a disc?

I used the spin operator to duplicate a circle, after that I tried to knife project all circles (single object), all the duplicated circles don't have an effect but the original circle is cut out. Why ...
7
votes
1answer
4k views

Split mesh into two pieces using bezier curve

I've created a Bezier curve, and used to shrinkwrap modifier to project it onto my object: Now I want to cut along the curve, splitting the mesh into two. How can I do this? If I just use knife ...
1
vote
1answer
855 views

Can't use “Knife Project”

I tried to use the "Knife project" tool in order to shape a soda can ring but, even though I selected both the object supposed to cut and the object "to be cut", it only results in the message "No ...
3
votes
1answer
968 views

Cut BMesh with python

Goal: Efficiently cut out (holes) or trim off regions of dense meshes defined by editable polyline or bezier curves which are snapped to a mesh surface. Uses: My narrow use is to cut teeth out of ...
2
votes
0answers
950 views

Merge vertex into an edge

I'd like to merge a vertex into an edge without subdivide the edge and merge the vertices; i usually use the knife tool, create a second vertex in the edge, set "cursor to selected" to the first ...
1
vote
2answers
442 views

Smooth shading of different vertices

I have this mesh: I Bisect it, select one of the parts, and Separate>By Selection. My problem is that because the vertices are not shared, there is a visible seam between the two parts. Is it ...
0
votes
0answers
373 views

Blender exported mesh extremely deformed

After exporting my mesh to FBX form to test out my sails in physx clothing, I noticed my mesh was terribly deformed. There were a lot of random spikes and abnormalities that appeared in the main hull ...
0
votes
1answer
216 views

Straight knife cut in perspective view?

Here are the methods I use to make a straight cut switch the view from perspective to orthographic just make a cut then straighten it with s+x+0 shift+7 to align face to view then make a cut use ...
0
votes
2answers
779 views

Editing different meshes together — Bezier curve and Circle

I've had 100% success finding answers to questions on this site, though, I've finally become stalled on one problem in which I don't even know how to phrase into a search. I can't seem to edit both ...