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.

Filter by
Sorted by
Tagged with
77
votes
4answers
214k 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 ...
62
votes
6answers
215k 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 ...
5
votes
2answers
2k 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 ...
16
votes
2answers
72k 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 ...
3
votes
2answers
4k 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 ...
10
votes
2answers
5k 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
4k 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 ...
7
votes
2answers
4k 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
676 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 ...
2
votes
1answer
118 views

The knife tool won't show the exact result that was done before pressing enter

So the first picture is right after I selected where I will cut, and the second picture is after pressing Enter/Space Bar which should apply my previous result to the world. But it is not what I asked ...
2
votes
1answer
1k 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 ...
47
votes
2answers
73k 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 ...
5
votes
1answer
519 views

How to fill ngon with quads?

Using knife project I have created a custom mesh for a modular Unity asset so it works for my use case. I now have a n-gon that creates a really ugly topology in Unity: I would like create quads from ...
6
votes
1answer
741 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
920 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 ...
3
votes
1answer
405 views

Knife Tool is stuck to the origin of the geometry of the object

The Knife tool is stuck to the origin of the object. I hover all over the vertices and edges, and nothing. There is nothing inside of that object, no hidden vertex, it's literally the origin. I tried ...
7
votes
1answer
5k 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 ...
5
votes
2answers
516 views

Connecting cylindrical hallways cleanly

I'm a newbie modeler and having trouble connecting two cylindrical hallways. Appreciate any help given! So here's the problem, I have a torus and a cylinder both acting as hallways in an environment I'...
2
votes
1answer
2k 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 ...
4
votes
1answer
1k 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 ...
3
votes
1answer
183 views

How to get rid of this poles?

How do i get rid of this pole? I tried to redirect edge flow using the knife but it distorts the curved surface. Is there a way around this? This is the shape I'm trying to model.
3
votes
2answers
916 views

How can I cut a complex Blender object in half?

As the title suggests, I have modeled an object, and I want to cut it perfectly in half, or close to perfectly. But as the object is quite complex, nothing I've found on google worked that well and/...
2
votes
1answer
2k views

Separate in two parts a Mesh using Knife Project

How can I separate this mesh: Using this plane: In two separate parts, the on above the plane and the one under? Objective: What I want to achieve is to separate the mesh in two part like a ...
2
votes
0answers
1k 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
0answers
123 views

Split a Mesh with a curve (knife project tool)

I'm developing an add-on in Blender and I need to manipulate in Blender before developing the tool. My goal : I want to split a mesh in two different meshes with the Knife Project tool in Blender. I ...
1
vote
2answers
1k 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
1answer
835 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
1answer
809 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
2answers
850 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 ...