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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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3
votes
1answer
981 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 ...
1
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1answer
252 views

Punching a Hole

Alright, I am new to Blender, I have watched many videos explaining how to make a hole in a mesh, but all the examples use just a plane or a cube, I am making a Helo/Jet or VTOL with props in the ...
1
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1answer
5k views

How do I use CTRL-R to cut all the way through an object, not just one face? [duplicate]

Can you please tell me if there is a handy shortcut or hotkey using CtrlR or the knife tool to cut ALL the way through an object and not just it's face? I want to make a simple cut to make the tape ...
1
vote
1answer
442 views

Is there a way to rotate and pan view while in knife tool and other tools that lock the view ports?

It seems there are many tools, such as the knife tool, that cause the viewports to lock up when you are "in" the tool. By "lock up" I mean that while in the tool I cannot rotate, pan, or zoom the view....
4
votes
1answer
726 views

Problem with knife project tool: the result is not smooth

I use a circle to cut on a cube by knife project tool, but the result is not smooth as the circle, did i do wrong some thing, please help, i'm very new to blender.
2
votes
1answer
7k views

Why the knife tool can't be used on some of my faces?

The knife tool or knife project tool cannot be applied on the faces shown in the screenshot, but they worked on other faces. I've used 'remove doubles' and 'recalculate normals' on my model but that ...
1
vote
1answer
393 views

Knife tool with Maya Settings

My knife tool (with Maya presets) will not introduce a vertex with LMB, but automatically introduces them on edges when I cross them (despite not pressing LMB). When I switch to Blender presets, the ...
2
votes
1answer
2k views

Snap to grid using knife tool

I have a situation where, after extruding an angled face, I need to make an edge of it flush with the grid lines. I tried to illustrate what I want to do with the image below. Note, the new location ...
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 ...
1
vote
1answer
150 views

Knife Tool Project - Cutting Away Volume

I am trying to create a model for 3D printing. I am trying to have this cylinder and hexagon shape "cut away" from the main mesh. How could I do this? It is to be the negative space of a bolt and a ...
3
votes
1answer
560 views

How to get the coordinates of the knife tool on an edge (in real time)?

After developing my first addon (Arrange objects along a curve), I was interested in continuing learning and developing scripts for Blender. The question now might be difficult, but I know it's ...
7
votes
1answer
3k views

How to cut a mesh at the edge?

Is there a way I can cut by continuing an edge? So I want a cut at the red line, possibility using the knife tool, but I can't use the angle snap, since its not on any particular angle, so is there a ...
2
votes
1answer
586 views

Disable snapping for knife tool cut?

If I use the knife tool, and I use it near edges, the mouse will snap to them and it wont allow to me make lines close to it unless I zoom in very close. How can I disable snapping for the knife tool?
10
votes
1answer
2k views

Remove vertex while using knife tool?

When using the knife tool, if I accidentally click in the wrong spot, is there a way to remove the last placed vertex instead of cancelling the whole operation and starting over?
5
votes
3answers
3k views

Knife Project - Extrude through thickness?

Is it possible to use the Knife Project tool to somehow cut through thickness and extrude the edges that are formed? I'm trying to cut through these 4 faces (2 "cubes") but Knife Project only ...
3
votes
1answer
1k views

Knife project on subsurf-object leaves artifacts

I have a plane with subsurf modifier, And a circle to cut(knife project) with. The hole is cut, but it leaves mesh(artifacts) inside of it. Creasing (Ctrl E) works on the outer edges only, leaving ...
6
votes
1answer
10k views

Knife project not working

In some simple cases such using the default Monkey as the object to project, the resulting cut looks nothing like the monkey. Note the selected cube only has only been cut around the monkey's eyes, ...
5
votes
1answer
7k views

How to cut a hole through both sides of a cube? [duplicate]

I'm trying to make a hole through the face: So it will come out just like this hole on the other side of the mesh: If it doesn't make sense, i'm saying this: On the first picture, It clearly has no ...
15
votes
1answer
49k 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 ...
2
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0answers
169 views

Why is the Knife Tool so Finicky? [closed]

So many times I try to use the knife tool and it simply won't grab anything. I move the screen around randomly and zoom in and out and if I'm lucky it will eventually start working. See gif for ...
34
votes
2answers
39k 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 ...
3
votes
1answer
867 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 ...
69
votes
4answers
161k 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 ...
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.
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 ...
54
votes
5answers
145k 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 ...
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
553 views

Can I confirm knife action with mouse, or other key than Enter?

Can I confirm knife actions with the mouse, or some other key than Enter? Going all the way to Enter breaks the flow in a way that's inconsistent with blender's philosophy.