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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20 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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24 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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21 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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16 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
195 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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21 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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22 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
38 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
114 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
28 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
13 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
58 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
142 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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470 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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44 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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67 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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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
46 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
30 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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23 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
42 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
311 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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36 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
208 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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22 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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25 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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26 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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34 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
235 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
71 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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23 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
150 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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510 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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3answers
39 views

Create cut from the wall exactly 0.3m in

I have a 3d plane as the floor that's an odd shape. I'm trying to create walls in from the side of exactly 0.3m. Attempt 1 Use knife tool. This works but don't know how to set in from the edge exactly....
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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 ...
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19 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 ...
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2answers
95 views

Scripting - Where is data not shown in the “Info” panel shown?

I notice that Blender only logs certain things in the "Info" panel. Is there some other place that they log data(such as if one were to have 3 vertices selected, where would they store that ...
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1answer
79 views

I dont seem to have the bisect tool

I also checked the add-on list for the bisect tool figuring it was probably unincluded but found no add-on as well so I am confused.
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1answer
23 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 ...
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1answer
137 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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1answer
45 views

Cutting a solid surface to make a overlapping junction

This one is a bit tricky. I'm building a RC submarine in Blender so that I can have it 3d printed. I want to have a removable "cap" so that I can have access to the electronics inside, ...
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70 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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33 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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2answers
40 views

Wierd shading when cutting faces

I'm a blender newbie. I'm trying to build an helmet, and I've got to the point where I have to cut the global object I've built so far to get the visor. After creating the bulk shape (basically a ...
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20 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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1answer
26 views

Why do grey faces appear on inset faces after using the knife tool?

When I use the knife tool with angle constrained on an inset face it leads to these weird grey patches appearing on the face and I don't know what they are. Is there any way to use the knife tool on ...
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40 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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27 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: ...
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2answers
85 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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371 views

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,...