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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Knife tool bugging out in certain areas

I'm using the knife tool to cut out landmass shapes on a simple plane object. Most of the time it works fine, but on certain areas, I get this weird ghosting effect with the cursor rapidly shifting ...
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259 views

How can I dig a hold between two object?

I have two models. Is there a way to make an Edge in one model by using another model's shape?
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Is there any difference between selecting knife tool in the tool menu and pressing hotkey "K"?

So I have been trying to use the knife tool, and I want to start my cut on an exsisting vertex. I noticed that if I click knife tool in the tool menu, I get a knife cursor, and I cannot start cutting ...
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Knife Project Issues in Blender 2.93

So I'm new with Blender and I'm attempting to cut a circle into an existing shape using knife project. I'm selecting my main object then selecting the "cutter" object in edit mode then Mesh -...
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380 views

Shortcut for changing constraint angle of the Knife tool?

In Blender 2.93 I could enable the Knife tool's angle constraint by pressing C shortcut. By default, it was snapping to 45°. In Blender 3.0 default angle constraint changed to 30°. I know that I can ...
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Problems with the knife tool/vertices when rendering with cycles

Hello! I've had this problem with the knife tool for 4 consecutive models, each time I encountered it I looked online and couldn't seem to find anything to help since I'm pretty much new to blender ...
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Knife tool won't go away

I'm pretty new to blender but I've nearly got the hang of it. Unfortunately, I keep running into the same problem: whenever I use the knife tool, it won't go away! No shortcuts are working and I can't ...
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Duplicate cut section of model

I'm very new to blender and all 3d modeling and currently have the following: I would like repeat the cutout section on the right to the section on the left. So far I have duplicated all of the '...
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Draw some Groove on Object [duplicate]

I'm designing a Sause Bottle In blender Lately. But I just Faced a Roadblock. As you can see in Reference Photos Below, there is some Grooves on The Top of The Bottle And I just Cant Pull it off! I ...
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Is there a way, maybe by an add-on, to subdivide mesh faces, in edit mode, at a fixed step?

I wish to subdivide (vertically and/or horizontally) aligned faces but with different dimensions (i.e. I can have 2 or more vertically aligned faces with the same width but each with a different ...
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Knife Project outlines shape but does not actually cut

I'm trying to use Knife Project to cut a shape in a cylinder. For now I'm testing on the cube. I've used this answer as a guide. I added the mesh cube, then added a curve circle. I grabbed the circle ...
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blender knife tool artifacts

so im working on a scroll and wanted to a add paper cut to the scroll, i did it by using the knife however when i turn back the subdiviosn modifier (i also have the solidify modifier) back the cut ...
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Intersect faces between 2 objects without join or boolean modifier?

I'm kind of lost in my research, in a scene I'm trying to modify an object that intersects another object. Let me explain, so I go with the example I've seen many times with 2 cubes among each other. ...
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How to use the knife project tool in a script?

I'm quite new to scripting in Blender, and I want to use the knife project tool from within a script. I try to mimic what the manual says about using the tool manually: select the object to be cut ...
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Is there a way to animate knife tool cut (or similar effect)

I am trying to get an effect where in edit mode a plane is cut with some pattern from the edge and then the pre-built animation will reenact that cut from original plane to that final form, following ...
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Undo bisect tool?

First time using blender and experimenting with ref to manual and YouTube. Haven’t been able to find out if it is possible to clear/delete a bisect. I’ve been able to alt click to highlight the bisect ...
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Mesh artifacts after Knife project

I used a Knife projection tool to cut the cockpit window out of a fuselage. But after that, I get some artifacts. (These weird lines coming out of the window.) Cannot understand what is the cause for ...
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How to define geometry from intersecting planes?

Is there a way to create a 3d shape by using intersecting planes? The image shows 6 planes that define an enclosed cuboid. I tried joining the planes, then using the knife tool with self-intersection, ...
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Applying the knife cut tool

is there a way to apply the cut used by the knife tool with another button rather than hitting the Enter key? can I change that? thank you in advance :D
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Help with using the knife tool

I've been working on a Blender tutorial for making a pencil, and I'm trying to use a knife tool for a part of it. I want to create a new loop that goes around the outside of the model, but it doesn't ...
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2 votes
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Removing of self intersection geometry

I was trying to follow this tutorial made in Blender 2.71.x but I haven't figured out how it can be done in 2.93.x yet. He pulls out the self intersecting geometry but when I try and do it, it says ...
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Cutting Shapes Into Another

I'd like to cut a complex pattern into another shape, to produce a square shape with holes of the pattern. However the knife project in both new and older versions of Blender either fails to work at ...
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Knife project that's not along view axis?

The knife project tool cuts a mesh by projecting a curve along the view axis. Is it possible to do the same thing using the normals of the curve instead? Imagine engraving text onto a mesh modeling a ...
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How to intrude / extrude a cube (or other irregular shape (knife tool) onto a uniform shape such as a dodec or icos?

In this case a dodecahedron. Using the Regular Solid Tool, I can create a dodecahedron, but, at it's easiest, it then has to be able to rest flat on the grid, which, as it's designed isn't easy, ...
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4 answers
557 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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1 answer
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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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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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Knife tool not cutting anything [duplicate]

My knife tool doesn't work, here is a gif of it.
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1 vote
1 answer
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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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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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72 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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Knife project not working (Blender 2.93.4) [duplicate]

Select the circle Shift select the cube Enter Edit mode knife project And it doesn't work Has something changed? What I'm doing wrong?
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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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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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2 votes
1 answer
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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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1 vote
1 answer
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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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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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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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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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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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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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1 vote
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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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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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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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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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2 votes
1 answer
380 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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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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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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2 votes
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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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2 answers
238 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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