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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1answer
350 views

How to subdivide concave face into quads

I'm aware of bpy.ops.mesh.vert_connect_concave() and the result is similar to what I'm looking to implement. However, with ...
2
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0answers
21 views

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: ...
2
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0answers
39 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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0answers
68 views

How to use knife tool properly?

I am new to blender. Is there a way to make knife tool cut exactly along the axes?
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0answers
977 views

How do I edit a face symmetrically, or copy and mirror it?

I want to cut out the shapes seen in the background of the image below, onto the plane: I want to do it symmetrically, preferably using the knife tool. The mirror modifier won't work here; I only ...
2
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0answers
188 views

knife_project in --background

I like to use the function knife_project() in a command line : blender.exe --background --python ... but bpy.ops.wm.redraw_timer(type='DRAW_WIN_SWAP', iterations=1) isn't avaible. I try to use ...
2
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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 ...
2
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1answer
104 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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0answers
23 views

Knife tool isn't working, at all

I'm trying to use the knife tool. My scene has a small scale, set up in millimetres. I've set the "Auto merge" to 0.01mm and lowered the view clipping to 0.01mm. When I select the knife tool ...
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0answers
15 views

Knife Tool not working in a scene

Strange thing: The knife tool does not work in one scene (meaning I am not able to click anything, the knife just hovers over the mesh). But... it works fine if I am opening another scene and apply it ...
1
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2answers
68 views

how to cut a sine shape on a cylinder

Trying drawing a sinelike shape on a cylinder Hi, I am trying to draw the picture below. I tried using boolean modifier on the cylinder but, I couldn't create an object that would like on the picture ...
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0answers
112 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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0answers
27 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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0answers
131 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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0answers
34 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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0answers
40 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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0answers
82 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 '...
1
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1answer
641 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 ...
1
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0answers
100 views

How can I add/cut face into an inside face of a cube?

I'm unable to cut a face into an inside face of a cube as it's not really accessible, can't move the view there. I was trying to zoom in and navigate inside of the cube in order to use a plane to ...
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0answers
109 views

Cut and separated object don't fit in real life

My problem is with cutting one big irregular pipe in two pieces which are printable in SLA 3d printer. After have it cut with "knife" I merge two edges with "bridge edge loops". The procedure is ...
1
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1answer
382 views

Knife tool with bmesh API

I need to find the intersection curve between two (open) meshes, and I can do that interactively with the knife tool. In search for a way to do it from a script, I came across the following highly ...
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0answers
22 views

Knife tool keeps popping up

I've accidentally clicked something with the mouse and now when ever I left click the knife tool comes up. I've tried pressing esc, however when I left click again it comes up, I've tried load factory ...
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0answers
17 views

Where does Blender store the vertex cuts the knife tool is making while it is making the cuts?

Once the knife cut is finished, the vertices it's created are easy to find. What about when the knife tool is actively cutting something, as in when the cursor has become the knife tool and clicking ...
0
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1answer
20 views

Changes made to mesh does not appear in final render but appers in viewport render

I did some detailing on a mesh with the knife tool, the details appear in the rendered viewport but when I render it out, either in cycles or eevee the details dont show, it renders the mesh how it ...
0
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1answer
53 views

Snap vertex without deforming mesh

Summary of Problem I would like to be able to move vertices, without deforming the surrounding mesh or edge, while snapping to another vertex or move it by a specified unit distance (Not percentage). ...
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0answers
42 views

Knife Project mesh without faces

Is there a way to cut these dome shaped edges with another mesh/curve? Knife project, Bisect and Booleans only work with meshes that have faces.
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0answers
27 views

Knife tool won't work with specific blend file, works with others

Running 2.83.0 on OSX. I have a .blend file with a scene I'm working on. For some reason, I can't use the knife tool on any object in the file. In edit mode, when I hit "K" or select the ...
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0answers
18 views

There's a problem with meshes in my Blender

I'm relatively new to Blender, but have become pretty good at modeling in the past month. But each time I edit a mesh, a problem occurs. Let's say, if I wanted to remove vertices in Edit Mode, It'd ...
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0answers
24 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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0answers
9 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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0answers
15 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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0answers
37 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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0answers
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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0answers
34 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 ...
0
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0answers
93 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 ...
0
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2answers
118 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
248 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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0answers
46 views

Using edge-loops/knife tools on character model?

I am doing an example model through a workbook, and I am stuck at a specific section. This section is asking me to add edge-loops to my model (creature figure). I can not get the edge loops to work ...
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0answers
175 views

Fixing jagged knife project circle

I'm trying to think of ways to fix a circular shape that I projected onto a half sphere and I can't seem to be able to fix it using circle tools or modifiers. If you look closely you can see the ...
0
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0answers
286 views

I cannot cut using knife tool to make a polygon with 4 vertices

I have started using blender today, I saw a video on Youtube and was trying the create a similar model but I am unable to cut the vertices to make it a polygon using knife tool. Whenever I hit Enter ...
0
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1answer
590 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
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1answer
143 views

3D Connexion Space Mouse stops responding during Blender operations

As the question title suggests, I have a minor problem with Blender's implementation of Space mouse/3D mouse control. I finally got the actual operation of the 3D mouse to be like I want. Except ...
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0answers
753 views

Intersect (Knife) not working correctly

I want my mesh to connect so I attempted Intersect (Knife). As you can see these edges are not connected, I pulled it away for the picture so you can see the topology. So I selected these faces and ...
0
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1answer
536 views

Messed up Topology (Shading?) due to the usage of the Knife Project Tool

Dear Blender Stack Exchange Community, After trying to model a sword (after a concept art) I did run into some issues after using the Knife Project Tool. I am trying to add some Screws using the ...
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0answers
197 views

How can I Knife Project only selected polygons, rather than the whole object?

So I'm trying to knife project a circle here See the circle? Well I'm trying to cut it into the blue part. But it'll cut it into the pink and green as well And even still, the circle doesn't even ...
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0answers
326 views

Knife project not working when using imported .svg curve

I am trying to import a .SVG curve and use it to cut shapes into a robot's mesh that I am modeling. After importing the curve and following Thom Blair III's advice from this question, the result ...
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0answers
278 views

Was the knife cut tool changed?

Did knife cut tool change its behavior from 2.5 to 2.76? I noticed, that in Blender tutorial, the behavior of Knife Cut tool is described differently, than I see. Particularly, in "exact cut mode" (...
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1answer
80 views

Turn off Knife cut “auto complete” setting?

Everytime i use the knife tool, it wants to auto complete and i just want to make one line, non of the short cuts get rid of it either.
0
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1answer
344 views

Odd Vertices When Using The Knife Tool

When I use the knife tool on my mesh, any face connected to the cut becomes "incorrect". (I don't know the true term) The underside of my mesh was smooth before I cut the mesh. Now, there are odd ...