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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16 views

Knife tool is not working

Knife tool isn't working.It doesn't show any selection when i hover over a vertice to start the cut. Anyone knows how to fix it.
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Using Knife_project in command line

I have developped an addon and I want to call a few function from command line. Everything works fine except when I'm using knife_project. Here is my code: ...
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2answers
63 views

Editing issues after knife project

After knife projecting, and heading back into edit mode, I find that all the vertices are invisible, and I get a very peculiar way of moving/editing things which is highly inconvienient. Here is an ...
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Is there an addon to improve the knife tool?

I see how to use the knife tool to draw shapes by clicking points along, say, an imported image in the background. But I want to know if there is a way to draw 2d shapes with precise angles (90 degree,...
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71 views

Cut/mask multiple planes along a circle at once

My challenge is to create some type of a radial chart so I created planes with an array. I scaled the planes randomly to generate "fake data". Now I want to cut all the bars (planes) along a circle ...
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6 views

how can i intersect an object with a 2d plane?

fairly new blender user.. been searching how to do this.. i need to add the edges and vertices of the plane on the cube. i need to find a way to remove the top part exactly where the plane meets, ...
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3answers
41 views

How to bevel a vertex corner that is between a circle and straight?

Only way I can imagine doing it is by manually adding a circle and editing it into the shape. Which is slow. Same with knife project and that also creates other issues and is also slow. Maybe there is ...
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36 views

How knife project a building onto a plane?

I want to knife project my building onto a plane so that I can easily make a roof. However when I knife project the result I get the following result: The steps I take are: In object mode I select ...
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44 views

Blender knife tool not working as expected

I'm trying to create vertexes using the knife tool; the object in perspective mode is: in plane after using knife: A point is always created on the back edges: It's incredibly frustrating to have ...
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13 views

Projection Cut around a complex Shape

i´m currently modeling a PS4 Controller. I nearly finished my work on the model, but theres just one last step, which im stuck with: I want to create a cut around the controller, that later will ...
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23 views

Cut Custom Shape into Side of Cylinder

I am trying to model a British Sterling L2A3 & I'm having serious issues with modeling the ejection port. The main body of the weapon is a cylinder with many different types of cuts, and I ...
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98 views

Blender 2.8 snap, knife tool does not work properly

Here is my question: https://stackoverflow.com/questions/60684130/blender-2-8-snap-knife-tool-does-not-work-properly Vertex extrusion to edge with snap enabled has gap (snap vertex to vertex is ok) ...
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15 views

Smoothing Uneven Concave Surface

After applying the boolean modifier for the cut, I need to clean up the scruffy looking concave section of this object. There was a method on youtube using the knife tool plus some additional ...
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28 views

Is this valid geometry? Any problems for games?

I'm looking to make low poly models for games so I'd like to keep poly counts minimal, but there is one thing I've done with the knife tool and I'm not sure if it causes any issues. I honestly don't ...
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18 views

How to cut extra piece of face on intersection with other face? [duplicate]

There is no common edges or vertices on intersection
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1answer
65 views

Airplane windshield

I’m trying to create a high detail 787 and I am currently on the windshield part. My question is how do you properly model a knife project object to work on all axis? Here’s my current window cutout: ...
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30 views

Knife Tool creates redundant edges and faces

When I use the Knife tool, Blender 2.81 create edges and faces which I don't want. How can I only create the edges and vertices which I draw with the knife tool?
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1answer
27 views

How do I attach floating vertices to the mesh?

I am trying to make a turbine with cuts in the sides. I did this with the knife tool and copied the vertices made with the knife tool to the areas marked on the picture. At the place where I used the ...
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1answer
150 views

How to use one object to cut a hole into another one [duplicate]

My issue is that I have 2 objects in edit mode, I want to use the second object to cut the first one to make a hole. I hope the image can make what I want a little clear because I don't find the ...
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1answer
60 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 ...
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23 views

Is there a way to bisect using a compound line or curve?

Right now, the bisect tool only works with a single straight line. I'm just wondering if the the question above is possible and, if so, how?
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1answer
819 views

Knife Project not available 2.8 (trying to cut two shapes out of one)

For some reason my knife project is not available when I search it, the only thing that comes up is knife, I am trying to cut one shape out of another shape but keep both shapes in tact so I would ...
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30 views

Why can't I use my knife tool project wide?

Been using Blender for years, but for some reason in this project I'm working on I can't use the knife tool. Its all low poly stuff and I've used the knife tool in the project since I started it. At ...
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20 views

Is it possible to Cut a curve in a sphear?

I want to cut a semi-circle curve into a sphear then apply solidify modifier. However i always end up with crimping along the curves. Is it possible to cut smooth curves in blender??
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14 views

How to cut edges with knife without deforming new vertex and edges?

I'm trying to cut a ring with knife tool in a rigged mesh, but new vertex and edges move to another position, I used to do this procedure but I didn't have problems, I don't know if I pressed a key, ...
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49 views

Attach road to terrain in a single mesh

I have the following terrain and road (extracted from OSM) i want to combine them so i can have 'nice' quads for the road and borders mixing nicely with the terrain; and combine everything in a '...
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1answer
61 views

knife tool not ending

I'm just starting to use the knife tool and, after I finish using the knike tool, I can't seem to get it off of the knife tool. How do I get it off of the knife tool?
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Can i select “extra edges” in ngon by script or special command in blender?

I have a problem. Maybe somebody can help me. I want select man on plane after knife projection without these "extra edges by script or one command". 1) Can i select "extra edges" in ngon by script ...
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2answers
21 views

Pushing back part of extruded region after using knife tool

Is there an easy way of pushing back the faces on the left part on the screenshot (selected faces) to the place the original faces were extruded from? Result should be like the one the right side. The ...
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1answer
126 views

Problem with Intersect (knife) - making extra cuts in mesh

I am trying to make a thread around a cylinder by cutting faces at the intersection. The cut tool makes extra vertices and connects vertices in random places. I also tried using the boolean intersect ...
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3answers
2k views

Making a hollow cylinder - Blender 2.80

I am trying to recreate the C64 logo in 3D, which roughly looks like this: C= My thought was to create a cylinder the size of the C, then create a second cylinder the size of the inside of the C, lay ...
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1answer
95 views

How to fix weird edges when doing knife project?

I am quite new to hard surface modeling but wanted to get into it a little bit. I am doing something like a Porsche 911 back and wanted to cut out the bonnet area. Since I thought Knife project would ...
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1answer
43 views

Cut out everything within a volume. Is it possible?

I have a very large model of terrain, spanning several thousand kilometers, with meshes of buildings and trees scattered across it. I'm only interested in one single area of the terrain, and I want to ...
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1answer
389 views

knife tool 2.8- used in past with no problems

Vertices are not appearing when I drag with the knife tool across the object in edit mode. Am I missing a toggle somewhere? I would include a picture/screenshot but wouldn't really show you anything ...
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1answer
77 views

Adding a vertex onto an angled edge in precise X position

I'm designing a part for 3D printing, but I do not know how to cut an angled edge at a precise absolute X position. I marked in red the place where I would like to insert a vertex. It's exactly 2 ...
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1answer
368 views

Blender 2.8 (Python) - knife project

In Blender/Python 2.8, I am trying to use knife project to cut a circle through a cube. I am attempting to automate a process I can do manually. My code is below; the last line throws this error: ...
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390 views

Blender 2.8 carving a circle out of the face of a cube using the knife tool [duplicate]

In Blender 2.8, I am trying to cut a circle out of one face of a cube, but for some reason I can't get it to work. My procedure thus far: (a) Add the cube (add -> mesh -> cube) (b) Add the circle (...
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2answers
65 views

Beginner Problem with Knife Tool

How can I use the Knife tool to create a line between two vertices? When I try to use it, the tool simply deselects my first vertex.
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175 views

Break up Model and Texture For Unreal Engine 4 Import

I have a large model (.obj file) that was generated by another piece of software and represents a real world location. I also have a very large texture (.jpg file) that was created from images of that ...
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76 views

3D Jigsaw Sphere

I've made a sphere which is UV wrapped with a picture of a world map, and then made hollow by using the 'solidify' modifier. I was wondering if I can break up this hollow sphere into a 3D jigsaw ...
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1answer
69 views

How do you cut a clean hole into an object that has been subdivided?

I can't get it to work using any of the existing answers to this question. I have a box that has been subdivided. I want to cut a square hole into it. I've tried using Knife Project and the Boolean ...
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1answer
34 views

Knife cut with closed sides like boolean difference does

I am using knife project to cut holes into an object. Is there a way to close the sides of the cut so I cannot see the hollow inside of the remaining part? I created the second picture using boolean ...
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1answer
54 views

Making a printable half sphere with a cutout in it for 3D printing

I made a half sphere which prints nicely. The sphere is to be used as a stencil for marking your golf ball. I used the Knife Project to cutout the F. This however created a lot of non-manifolded ...
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1answer
405 views

How can I make the knife tool cut in a straight line between two vertices?

If I were to make a sphere and cut between a vertex near the sphere's "north" and a vertex near the sphere's "east," the cut becomes curved in a way reminiscent of the Coriolis effect. I just want the ...
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2answers
105 views

Why I can't cut there with the knife tool, I want to make a quad out of this n-gons

Why I can't cut there with the knife tool, I want to make a quad out of this n-gons
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1answer
160 views

Non-manifold, bad contig Edges and Sharp Edges on simple basic geometry

I have had issues trying to produce clean geometry for 3D printing for what is simple geometry. I check wether my mesh is clean or not using the 3D printing addon. Here is a step by step simple ...
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1answer
422 views

How to make a precise bolt hole in a simpler way?

I'm new to blender and using it to create 3d objects for my printer. Part of this is "cutting" holes for bolts very precisely which I managed to do but my way is so long/tedious I must be missing ...
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1answer
326 views

How to evenly divide a face when loop cut doesn't work

I have a face. It is rectangular, but has extra vertices linking it to surrounding faces. From what I've read, these extra vertices are likely the reason why loop cut (my go to tool for this type of ...
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1answer
817 views

Knife tool won't select edges

I've looked everywhere but nobody has this issue, I'm using blender 2.8 and I'm trying to cut a plane model from a top view, but when I press k, select the edge, and then try to cut the inside, it ...
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1answer
1k 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 ...