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
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 ...
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1answer
1k views

Blender 2.8: how to cut non visible edges?

I'm using the knife tool (shift + spacebar + K) to cut a cube. I would like to reach the edges that are behind my current view also. What is the procedure?
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1answer
423 views

How do I remove the overlap from merged meshes?

I have recently decided to delve back into 3D modeling, I am a hobbyist I guess you could say. I have been trying to find a solution for this particular problem for days now. I have scoured this as ...
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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 ...
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1answer
589 views

How to delete internal intesected faces?

The following mesh is created by converting a curve with bevel effect like below: The mesh has some faces which extrude into the inside of the shape. This effect can be seen by cutting the mesh into ...
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1answer
126 views

Quad Junctions. Why are some not working the same as identical looking one nearby?

NOTE: as per Moonboots helpful suggestions. Here is the .Blend file for this problem: Hello all I am trying to learn Blender. I've read lots and watched lots of videos and kinda understand the ...
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1answer
335 views

How can I cut an edge at the mathematical middle?

I have an edge selected and I need to add a new point that is exactly at the middle of that edge. How can I achieve that?
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1answer
547 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 ...
2
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1answer
173 views

Slice surface mesh with polygon

I would like to cut a shape out of a surface mesh using a polygon. The "Knife Project" function isn't working for me, as it changes the size of the polygon. When it projects the polygon down onto ...
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0answers
53 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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2answers
2k views

Cutting multiple objects

How do i cut all these small cylinders in stright line like this?
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0answers
103 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
75 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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1answer
1k views

How to cut a mesh outline on another plane

I'm going to be printing a prop gun in two halves and in order to glue it together perfectly, i want to print an outline mold of the gun so both halves can set straight. I tried using the knife ...
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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 ...
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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 ...
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1answer
155 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.
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1answer
84 views

read the source of any tool ( operator )

As you read in the title, i want to read the source of any tool, but more expecificly i want want to read the code the kinfe_tool. I can´t find the source to that tool, why?? (i have already try to ...
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211 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 ...
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300 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 ...
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2answers
265 views

Impossible to cut terrain surface with knife project tool

I am struggling to cut a terrain mesh with several triangles with the knife Project tool. I defined the auxiliary geometry and selected the two entities, but when I apply the Knife Project button, I ...
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1answer
451 views

Cut both top & bottom of the mesh with knife tool

Is there a way to draw the top of the mesh and bottom of the mesh at the same time using knife tool? I would like to draw and cut the same shape at the top and bottom of the mesh. Thank you, W
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0answers
186 views

How to use knife tool in python? [duplicate]

I want my script to cut geometry faces with knife tool. I read about bpy.ops.mesh.knife_tool() but there's no parameter for specifying the cut path. Is there an ...
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1answer
2k views

Having trouble with knife tool

I am having an issue with the knife tool. I'm attempting to make a cut where the maroon line is in the above image, however, when i click the left mouse button, the line goes away, and no cut is made. ...
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1answer
827 views

Why does the knife tool create random extra geometry?

The knife tool seems to be generating duplicate vertices, creating additional unwanted geometry. Is this a bug or related to camera or tool settings? Any idea? edit: Clarifying the vert:
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110 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 ...
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1answer
797 views

Knife Tool - Constrain to global axis?

Is there anyway to cut a face whilst still constraining to a global axis regardless of the view orientation? The knife tool appears to constrain to 45 degree increments but this only appears to be ...
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1answer
192 views

Shading Issues after knife project

Just starting out in the world of Blender 3d and I am trying to replicate the bottle below but am having difficulty creating the ridges that go around the centre of the bottle. ​I have tried a couple ...
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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 ...
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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 ...
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1answer
208 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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834 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 ...
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1answer
303 views

Union partially overlapping cubes without boolean modifier

My goal is to generate a model composed of many partially overlapping cubes. But I need to get rid of the parts where they overlap, so I have a single mesh without any intersections. One of the ...
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1answer
6k views

Knife project not cutting through

I have a simple rounded edge prism. I created a circle to use as the "knife" because I want to cut 2 holes through the prism. I first select the circle, then select the prism, go into ortho view, ...
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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 ...
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0answers
1k 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 ...
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1answer
402 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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2answers
2k views

Cut faces where they intersect with the mesh

I exported an object from a game and I am working to clean it up so I can 3d print it. I am almost finished, however I have a small issue with the gun barrel, where I created some new faces to close a ...
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0answers
38 views

Want this cut-out part to be seperate object, how? [duplicate]

I have cut out this selected piece with a knife and i want it to be a part of its own in the right colon (scene section). Right now its still part of the cube around of it. What is the option for this?...
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1answer
1k views

Selecting 1 side of an edge loop in a mesh

Hi, I created an edge loop by knife tool on this model (with K , then Z shortcuts in edit mode). Now, how can I select all the vertices only right or left side of it (selected vertices will be ...
2
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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
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1answer
180 views

Knife project tool is looking rough after I extrude on a curved surface

Hello Blender Stack Exchange Community! I'm creating a cuff bracelet and using the knife project tool to "etch" text on the inside of the cuff, but the results are super rough. The cuff (mesh circle)...
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1answer
313 views

Automated vectoring or knife tool / autotracing

I use the knife tool in Blender to create holes in the object geometry (trace the assigned texture). This takes a lot of time. Is there a function or a software product to autotrace the assigned ...
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1answer
710 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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1answer
550 views

Height map to cube

I have an textured object that looks approximately like this. It is one-sided, like a height map. I want to make sort of a cube out of it. And I want to keep the texture. How could I do it? I ...
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1answer
845 views

Why does 'Knife Project' only sometimes select the new faces?

In some cases the result of the cut with knife project is not selected, why? How do I get the result to be selected?
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3answers
2k views

How to generate a cylinder with a hole except by knife tool and Boolean methods

This is a shape I want to generate. I know it is a very easy to generate by a knife tool and boolean method. But I want to use the extrude method to generate. a unfinished work is shown as following ...
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0answers
218 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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1answer
3k views

Cutting a 2D plane using intersecting planes as a guide

Sorry if this seems like a newbie question (I'm very new to Blender!), but what's the easiest way to cut into a mesh using other objects as a guide? I attached an image for clarity. I want to remove ...
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1answer
120 views

Blender cutting face to fit a hole

I have a hole like this in my mesh I wish to fill these 2 holes by cutting larger faces to fit, that way I don't have to do the UVs myself since these large square faces already have UVs. Example: ...