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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4answers
115 views

Is it possible to clip half an object indirectly similar to section plane in SketchUp

Hello beautiful artists, I was wondering if I could clip a finished 3d model to view only a portion of the model without really messing with the object mesh directly. The idea is quite similar to the &...
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1answer
19 views

Rotate view with active knife tool not possible with Maya settings

I am using Blender 2.93 with Maya modelling settings (alt + left mouse button for tumbling). It's not possible to rotate the view while using the knife tool. How can I fix this problem? Thanks for any ...
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2answers
16 views

blender object doesnt scale, new vertices appear instead

Im new to blender and this happens when I try to scale extrude etc. The object itself doesnt transform and new vertices appear istead.
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1answer
26 views

Knife tool not cutting anything [duplicate]

My knife tool doesn't work, here is a gif of it.
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1answer
45 views

Knife project error (Bug v2.93.4) [duplicate]

I've looked through the other posts, none of them helped me. Keep getting "No other selected objects found to use for projection" when trying to use the 'Knife Project' tool. Very confused, ...
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2answers
37 views

How to cut the same geometry into two similar meshes?

I am modelling an airplane, and I want to cut windows into both it's front doors. Every door is a separate object. What I tried: I selected both doors in Object mode I went into Edit mode I pressed <...
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28 views

How to add more faces to triangular mesh

I need to add more faces to this selected part. I have tried adding edge loops but that won't work. I have tried the knife tool but that will take too much time to make, any suggestions?
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67 views

Knife project not working (Blender 2.93.4)

Like always: 1- select the circle 2- shift select the cube 3- edit mode 4- knife project And it doesn't work Has something changed? What I'm doing wrong?
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1answer
31 views

How to cut a quadratic hole into a face of a mesh?

I am modelling a house in Blender and want to inset the windows. To do that, I thought I would cut out a quadratic hole from the middle of the plane, then extrude the new vertices and create a face ...
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27 views

Turn knife cut into a lasso knife cut?

is there a way to to turn knife cut into a lasso knife cut? So far its just point clicks but ive seen ppl do a lasso version before, just without explaining how they do it
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1answer
98 views

How to draw edge using an object

is there a way to add an edge like a knife tool, but using an object to follow its shape? I'm having a hard time using the knife tool since it doesn't give me accurate results like curvature when ...
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1answer
35 views

3D Knife Project / Boolean Cut

Say that I have two intersecting cones: Is there an easy way to cut the contour of this intersection into the mesh of one of the cones? While I do have a functional workflow (see answers), it is ...
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20 views

How to deconstruct a ready-made model to view the inside? [duplicate]

okay, so i recently bought the transportation addon from here https://blendermarket.com/products/transportation and i realised it was intricately built.. to the point that the seats, entertainment ...
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0answers
31 views

How to disable snapping for knife project?

I am trying to cut two different meshes A and B with the same polyline P so that I can join A and B afterwards with no holes or anomalies. I am using the knife project tool and this works quite well. ...
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15 views

Cutting one mesh into a bunch o equal sized square meshes?

I have a massive STL I want to print, and I want to print it at a very big scale so I need to cut it into equal sized square parts, as if I was using chicken wire to cut it. I'm also extremely new to ...
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47 views

Artifacts on mesh from making cuts with knife tool?

I'm a creator for the sims 4 and, for the purpose of creating for the game I use blender 2.70 (it's the one I have to use to be able to import to another external app to make new meshes). Anyway, I've ...
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1answer
44 views

knife tool doesn't work [duplicate]

I'm trying to use the knife tool. I click on the tool and it does appear. But when I try to press LMB to cut, instead of the guidelines I am supposed to create appearing, the only thing that happens ...
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40 views

Bmesh: How to select newly created vertices?

I'm running bpy.ops.mesh.knife_project(cut_through=True) using an Edge to Slice a mesh. Next I want to select newly created Edge loop and remove all other vertices. I'm thinking of capturing two ...
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0answers
32 views

Brainstorming Recreation of MODO Contour Tool

currently working out how to reproduce MODO's contour tool in Blender. I've tried a couple methods and ran into road blocks. Below is a snippet into my attempts. Ideally this script would be a low ...
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0answers
35 views

How to save the knife tool cut line?

How can I save the line before cutting ↲ Enter? I thought of vertex groups, though can't use them for this purpose since the line disappears immediately on clicking outside the mesh.
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29 views

Crop Plane to Polygon using Coordinates (Python)

I want to crop a textured plane to a polygon defined by a set of world coordinates. The process must be scriptable using Python. Something like the knife tool, except using defined points instead of ...
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1answer
219 views

How can I cut an edge from a plane?

I wonder what's the best workflow for a such basic task: I want that the plane would have the same two corners. I got stuck at the 7th step. Two questions: How can I cut that duplicated edge from a ...
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26 views

How to export a "sliced face" of an object into a dxf?

I know my question sounds weird but I will try to be specific as possible. Please be patient and please don't flag this question with another question: I would like to hear what everyone needs to say ...
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23 views

Help! Im getting these weird streaks/cracks when I knife project

The longs streaks is what happens when I knife project, is there a solution or another method. I am trying to put doors on a plane fuselage
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1answer
51 views

How do I make a cut parallel to an edge?

How do I make the cut in the picture parallel to the active edge? How do I also make sure the thickness of the cut of area is a certain value (in this case 3mm).
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2answers
141 views

How can I fix these artifacts?

I am trying to model this hammer. I used Looptools instead of Boolean as less destructive but it seems these artifacts are inevitable. I included the .blend file. It was mainly a combination of ...
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1answer
35 views

Copying a meshes intersecting outline from the top down view

I have a sliced shape that I would like to copy it's outline as it's seen from the top down view (looking straight down on it). Example: I have an equation that is sliced by a plane using the ...
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1answer
17 views

Using knife tool to cut all around a an object

Please see the following https://www.youtube.com/watch?v=PK36W234WV0 specifically @ 12:40 where the knife tool us used to cut not only the top face but all around the cube. When I try and do this I ...
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1answer
134 views

3D-print friendly joints

I am trying to split a figure, so it will fit in my 3D-printer. For the pieces to fit together after the slice, I plan to make a ball joint or a trapeze joint, and glue them together, just like this: ...
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1answer
466 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 ...
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2answers
1k 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/...
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2answers
82 views

Subdivision Surface Modifier partly closes holes

I am trying to recreate a wireless phone charger. And the hole for the USB-C input will partly close itself when adding the subdivision surface modifier. The hole is created using the knife tool on a ...
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0answers
139 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 ...
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0answers
19 views

Transforming SVG path duplicates so they are arranged as if they were a texture

I am developing software to apply SVG paths to the faces of polyhedra. This allows me to create paper polyhedra with holes in the faces of the shapes. You can see an early demo of the software with ...
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1answer
53 views

How can you cut shapes out of an object with other objects?

I know this has been asked before but I seem to be struggling to use either the knife project tool or merging meshes and then separating out sections to cut pieces in a mesh. This is probably due to ...
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1answer
44 views

Knife tool just not working on simple object

I'm trying to slice my 'house' so I can create a ridge, but the knife tool doesn't seem to work on this object at all. Despite snapping to the verticies correctly, as soon as I press enter, it just ...
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0answers
24 views

How to make the outline of the cut clearer with Knife Project?

This is my result of knife project and this one is when I saw some tutorial, is it just about the setting of the view, or maybe there's a way to make the mesh clearer?
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1answer
47 views

How to get a plane to intersect and join/merge with the perpendicular plane?

I'm trying to model my house as a way of learning Blender. I'm having a problem filling in a small hole after following a tutorial about roofs. It's best demonstrated with a video, but basically I ...
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1answer
576 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 ...
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41 views

Problems with knife tool

I'm having some problems with the knife tool, sometimes it works and sometimes doesn't. I would like to cut the shape of the lingerie texture at the body but the knife tool works at some places and ...
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1answer
392 views

Optimal way to fill terrain between roads

TL;DR: Need to fill inside and around the roads with mountains and landscape, using a single mesh, don't know how to do that most efficiently. I've made a road around an A.N.T. Landscape generated ...
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35 views

Blender 2.8 knife project making cut in different position

I'm trying to use the Knife Project function under Mesh to cut a hole in my plane's fuselage, but it is making a cut in the wrong place. I tried using the Knife Project function in other places and it ...
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0answers
46 views

Can't use Knife Tool to cut across specific loop side

Trying to use the Knife tool to cut a box out of these 2 edge loops. Problem being, the knife doesn't add a single cut when LMB on top of them. It does, however, work when i do the same thing on the ...
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0answers
37 views

Knife tool not cutting

I messed something in my model and I cannot knife cut any geometry. If I move geometry to new file, it works. So it has to be some model settings that I tweaked and now Knife Tool does not cut. It can ...
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0answers
41 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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2answers
255 views

Using knife project method to make a shape into the mesh

I’m practising some modelling methods, although I know knife project method is not the best because it can make a mess of the topology, I couldn’t figure out another approach to achieve this ...
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2answers
115 views

cut out a piece of the terrain

See image. I'm trying to cut out a small piece of the terrain to use for particle system (scatter trees, grass etc). I used the knife tool to draw the area (orange line). How can I then delete the ...
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0answers
30 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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1answer
192 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.
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2answers
520 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'...

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