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# Questions tagged [bezier-curves]

A Curve is an object that is expressed in terms of mathematical functions, rather than as a series of points such as vertices. Use this tag for any questions pertaining to the "Curve" Object type in blender. Use this tag for questions about curve object types in Blender.

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1 vote
18 views

### Conical pulley system

I've been trying for days different ways to make the rope in this pulley work, but using a curve modifier to go around the cone doesn't make the right effect since the rope is supposed to be attached ...
• 11
15 views

### How to implement 2 f-curves: 1 for camera position and 1 for speed?

I'm trying to have 2 curves: - 1 for the spline that the camera will follow - 1 for the speed of the camera How it currently works: At each frame n, I evaluate the 1st curve for n, and the camera's ...
• 121
42 views

### Mesh objects in array modifier not evenly spaced when adding a curve modifier?

I'm trying to make an ammo belt using an array on a curve. When the belt is in a straight path, it looks good to me, but when it curves on top, the distance between the bullets is longer than it ...
38 views

### Modify a segment of a spiral with geometry nodes

I need to deform o modify a segment of a spiral curve with geometry nodes: to turn the last loop into a closed circle. ¿Is it possible?
24 views

### Help Understanding Curve Anchor Points

I am trying to bend an Array Object along a Curve (using a Curve Modifier) that starts at the same 0,0,0 location as the object. But the Curve Modifier changes the Location and Rotation of the first ...
• 1,857
40 views

### Text along curve or circle with Geometry Nodes

I'm trying to align text along a circle or curve using Geometry Nodes, but it's very messy. Where did I go wrong? (Blender v 4.1.0)
• 1,361
8 views

### Bridging two edge loops creates weird effect in smooth shading [duplicate]

I created a bezier curve and converted it into a mesh so I can bridge it's edge loop with the edge loop of another object. Before I bridges the loops I joined both objects. I deleted any faces between ...
1 vote
16 views

### Place different objects on curve with exponential space between

Hello everyone, how can i place all these different(!) objects to the curve, with using empty as a space, rotation and location controller between them, but exponential increments or decrements. As it ...
• 11
18 views

### How to add new controlpoints to a curve at a specific time?

If I have a curve, how could I add a new controlpoint at the location in 3D space at time t on the curve? I've tried looking at the docs, and they don't seem to provide a way to evaluate a bezier ...
• 121
12 views

### How to let player determine path through a tunnel at runtime?

I'm trying to create a game/animation where the player is traveling in an infinite tunnel and they have control over where the tunnel goes next. Imagine you were in a subway train's driver cab and you ...
• 121
15 views

### Abstract ribbon

I'm trying to model an abstract ribbon like this. I can extrude it as a flat face with a Bezier, but I'd also like the thickness - thicker and flat on the bottom so that it can lay flat, and coming to ...
23 views

### How to stabilise the Curves info random value?

I am using the SouthernShotty's workflow and node tree to get hair that has different colour on individual hairs. He uses Random output of the Curves info node for this step, which works. However when ...
1 vote
41 views

### how to apply tilt to a path?

I have this path: and i want to move the last vertex, to make a little curve, but this happens: how can i apply a tilt, like in ctrl + A changing the "twist method" to "z-up" ...
104 views

### Bevel Or Smooth - Sliced Sphere

I am trying to re-create a car lens. Have Sliced into a Sphere and 2 Cylinders to create the object - and want the sliced edges to blend as smoothly as possible without showing the creases. As the ...
• 21
47 views

### how to set normal curves (free control) and transfer for mesh

i would like to make a stadium but have some problem with setting normals here's what I got with geo node: And this is how I want to control the angle I would be very grateful if someone could tell ...
• 1
55 views

### Deform a flat object/wire on the surface of an irregular object

I modeled this sort of wire outline - that was a bezier curve that I added depth to - that's on top of the bulb-shaped object, and I want to make it be on the surface of the bulb as if you drew it on ...
• 23
17 views

### Why is blender crashing with this code line: bpy.ops.gpencil.convert(type='CURVE', use_timing_data=context.scene.transfer_gp_timing_data_toggle)

I selected a grease pencil scribble that wasn't too complex, and the convert tab grease pencil to mesh works very fast on my computer. Blender crashes when executing this line: curve_obj = bpy.ops....
61 views

### How to make a reversal of sample curve node

I have a vector (XYZ coordinates from the hit position of a ray-cast node) that is more or less on it, but not perfectly (because for the raycast i had to use curve to mesh). I need to get the factor (...
22 views

### Add Bevel to curves when using a solidify modifier for thickness on a imported .svg logo

I have an imported logo .svg file that is in curves. I have eliminated the top faces by using Fill mode: Back. I now want to add thickness inside the logo itself, so I have used a solidify modifier. ...
• 383
119 views

### Remove top Faces still using curves, is it possible?

I have a logo in .svg format that I imported into Blender. I've extruded the text upwards. However, I would like to know if it's possible to remove the top face of the logo. Is this doable while ...
• 383
126 views

### How can I seperate and fill mesh islands in geometry nodes?

I want to animate complex curves with shape keys. When I have overlapping curves within one curve object, Blender doesn't fill the overlapping parts. My desired output would be this, but as one ...
• 87
86 views

### What is the best way to create a clean 3D dotted line on a surface using a bezier curve?

I am drawing bezier curves onto 3d objects for a project. So far, I have been doing it like this: Add a new bezier curve Go into edit mode, select the draw tool, set depth to surface, and draw my ...
36 views

### How can I make a dragon/fish/monster fin using geometry nodes? Already have have the spikes, just need the fin!

First time on Stack Exchange, so I hope I'm doing this right! I'm in the middle of modeling a dragon and I would like to have a fin running down her back supported by spikes. I modeled this by hand as ...
35 views

### Increase uniform space between curve points before instancing

I'm building a train rail generator, and I'm hitting a wall on this particular issue. Don't know much about geometry nodes yet, so bare with me :) When generating the rails, I'd like to be able to ...
1 vote
28 views

### How to Convert Mesh to Curve but Using Face, instead of Edge

In short, I can convert any mesh into a Curve but it uses Edges. Is there any way to make a Curve but in the middle of the face ?? I want to use this method to create a Street Curve from Street Meshes ...
• 49
47 views

### Define custom Spline Index OR Rebuild Sample Curve Node

Is there a way to set a splines index or otherwise store an attribute on a spline that can be read as 'curve index' in the 'Sample Curve Node'? I'm asking because i have a setup where meshlines are ...
• 57
39 views

### Distribute instances along a curve equidistance on cuve projection on a plane

complete beginner here, so bear with me please! I would like to create a palisade fence with the help of the geometry nodes. At first sight it seems simple: Curve --> Resample --> instance on ...
65 views

### Find outside/inside curve of two curves

in geometry nodes i want to determine which curves lies on the inside (our outside) of a turn. I found out that it should, in general, be possible to do so by calculating the curvature of of the ...
• 833
1 vote
23 views

### How to bevel a curve using the geometry of another object

I have a Curve. I want to bevel the curve using the geometry of another object. In this example, the other curve is a Rectangle, and it is called ‘Rectangle’. So, I select the first Curve then: Curve ...
49 views

### Why does moving these two curve vertices give such different results?

Does anyone know what key combination or function can help me control hair 1 to be likehair 2 without it spinning around like in ...
1 vote
88 views

### Taper a geonodes curve to center of curve & adjustable via group input?

I've created and resampled a curve and want to smoothly taper it to the center. I'm able to do exactly what I need using the spline parameter node and a float curve, but the problem is that I'm unable ...
• 159
121 views

### Screw modifier of a curve that intersects the rotating axis produces weird faces and problematic normals

I have a curve on the XZ plane that intersects/crosses the Z axis (and its center of geometry) I want to apply a screw modifier with only 4 steps using this curve, and the problem is that after that ...
• 171
178 views

### Procedural extrusion from an object

I am trying to find a way to create procedural extrusions of an object. Assume our base object is a manifold object with a curved surface, such as a sphere (Fig 1). I would like to use a Curve object ...
• 336
55 views

### Modify individual instances after instancing on points along a path

I've created a pipe bracket which I want to distribute along the pipe(a curve), I'm using geometry nodes to achieve this, and my node tree is shown in the picture below. I want to delete the first and ...
43 views

### Geonodes question: Is there a way to set different widths on one single curve?

I'm trying to get a different radius/width for my curves. This is what I got so far, I'm generating a mesh from my curves where I can control the subdivision and the width. The thing is I can't get ...
81 views

### Array mirrored object around curve

I'm trying to recreate a scene from the opening sequence of No Time To Die: (https://www.youtube.com/watch?v=awZQdw_iNZY&list=RDawZQdw_iNZY&index=2&ab_channel=HDFilmTributes) There are two ...
• 21
34 views

### Blend different objects of the Bevel Object of a Bezier Curve from Start to End?

I hope I will be clear in the question as English is not my native language. I am designing Surf Board on Blender, and then CNC them. I changed quite a lot my process to work with Blender lately to be ...
• 125
788 views

### I want to realize a bridge zigzag rope with geometry nodes

Suppose I have two upper and lower curved ropes in a geometry node, I would like to achieve a zigzag rope in that section. Ideally, I would like to learn the points of the upper curve and the points ...
• 513
1 vote
48 views

### Merge two curves with geometry nodes

I have this simple geometry nodes setup which gives me the following result As you can see, the junction between the two curves is not merged properly, so when it is converted to mesh it does not ...
37 views

### How to delete specific part of a mesh that follows a Bezier curve, through geometry nodes?

I am working on meshes which is created based on idea of tessellations, I want mesh to follow a curve (say, Bezier) using geometry nodes, which I am able to do to some extent, but the issue is, once ...
65 views

### Blender Geo nodes offset curve

So I am in the process of writing a geo node modifier where I can create curves that are offset from the original curve by a certain amount. I would like to be able to offset the curves by an amount ...
• 23
1 vote
14 views

### Apply Transformation from Mapping Node to UVs?

I'm using the mapping node in the shader editor to create different UVs for curves without needing to convert them to mesh/unwrap them first (I'm doing hair cards, all the cards are on one texture). ...
50 views

### Criteria for Spline direction

I often work with instances or deform geometry along splines, and I consistently find myself struggling to control the output of my operations. Blender sometimes changes the spline direction randomly ...
45 views

### Using SVG image as curve profile in Geometry Nodes

I have a question regarding curve profiles in Geometry Nodes. Does anyone know if it is possible to use an SVG image profile directly as a curve profile in Geometry Nodes? (The SVG is already imported ...
• 195
457 views

### How to model a spherical snowflake?

Hello everyone, I've been trying to model this shape in blender, I tried bending planes, projecting curves on the surfaces but still couldn't get the perfect result. Is it possible to project this ...
• 51
14 views

### Blender script for turning on curve profile with crown molding preset

I am making a simple script that either turns off bevel geometry for a curve or turns it on with a Crown molding preset. My problem is that it seems to not be possible to set the preset, at least not ...
17 views

### Applying a deform curve modifier to a timing belt [duplicate]

I'm trying to model a timing belt to drive the print head of a 3D printer. When applying a Deform > Curve modifier to the timing belt, using the BezierCurve, the timing belt disappears from view. ...
34 views

### Can anyone tell me how to modify a cylinder into a spiral using a spiral Bezier curve on Blender?

I am trying to create a spiral object using a spiral shaped Bezier curve. My initial object is a cylinder and I am using curve modifier to do so. I have tried to change the axes as well, but nothing ...
1 vote