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Questions tagged [geometry]

Questions pertaining to creating, generating or editing an objects geometry. Object geometry is defined by editing and creating the location and rotation of vertices, edges, and faces.

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19 views

Compute density fluctuations of particle distribution of a surface of 3D geometry

I am using Cellblender to model bio molecular reactions within a 3D geometry that I created, but I am still a novice in Blender. As part of these simulations a fixed number of particles (my case N=60, ...
2
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0answers
30 views

How to make a spiral torus?

How to make a spiral torus as shown below? I do know how to make various spirals in Blender, but this one escapes me and makes my head spin (forgive the pun). I believe it consists of several torus ...
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0answers
40 views

Are there really so many triangles in this model?

I have uploaded a blend file here. It's the model of an RPG: Blender says that the model has 30940 triangles. From looking at the mesh in Edit mode, it doesn't look ilke 30k tris to me. Rather 4k ...
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1answer
26 views

Where are the many tris located in this model?

I have downloaded a Blender model which I like very much. This model seems to have a really wise geometry, there are not more triangles than necessary. I can judge by switching to Edit mode and ...
0
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1answer
14 views

Moving in a straight line

For testing purposes, I have selected a face of a cube. Then I dragged the face down using the green arrow. It seems to have worked fine at first. However, when I then rotate the view, I can see that ...
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2answers
29 views

How can I quickly make two normals opposites?

The best way I can really explain this is, in a 2D space, two lines are parallel when you can draw a perpendicular line between both of them. In a 3D space, if you have two surfaces that are facing ...
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1answer
21 views

Is there a way to export an object without all of it's inside geometry?

For example: If I had a cube and hidden inside it's bounds there was another, smaller cube and I joined/merged/combined them into one object, is there any specific action I can do to make the ...
1
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2answers
54 views

What causes these black streaks along certain (concave?) edges?

I have a model with an open mesh terrain surface and some closed building meshes – when rendering in Cycles I'm seeing black streaks along some mesh edges. On the building models it seems to be ...
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0answers
7 views

Object Location / apply doing funny things

I set my camera rig (created following this Answer) to follow a path, and it’s keeping station some distance away with a faint dotted line pointing to the position on the path where I expect it to be. ...
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0answers
16 views

Modifier: Remeshing with blocks. What's the algorithm?

In Blender there is a function representing your object with cubes (where you can find it: see attachment). This makes the object look like Minecraft style (see attachment). This "Minecraft style" is ...
1
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2answers
137 views

Beveled cylinder cutout

Despite being more proficient in Blender than last time, I'm still struggling with round shapes. Currently I'm working on a small part of a model - a fluid intake. However, I can't seem to create a ...
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0answers
20 views

What do you call modeling complex geometry using very minimal cages?

I've seen artist using incredibly complex geometry using strategically placed cages with subdivision surfaces applied. What do you call the technique used to modeling complex geometry using very ...
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0answers
22 views

Convert/assemble multiple VRML objects to one object

first of all: I am from Germany and my English is not the best. I am working with blender to visualize different objects in different file formats. The reason of this is my research with voxel ...
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0answers
14 views

access point/vertex/prim(poly)/detail attributes inside of blender

How to make use of attributes created in Houdini inside of Blender. For things like particle system density, length, color, geometry to scatter etc.
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0answers
28 views

How do I get rid of ugly creases from loop cuts?

So I'm creating a spider in Blender and after adding a material to my mesh, I noticed in render mode that there was an ugly crease torwards the head (highlighted in yellow in edit mode). I did not ...
0
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1answer
35 views

How can I use Mesh as a Tile on Geometry?

I am currently developing a scene and some assets to work with. I'm not using any UV mapping or texturing as I'm going for an old polygonal 90's look. I have a 'Grass' mesh that I want to use as a ...
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0answers
19 views

How to close/fill an incomplete-surface with a closed loop

I am trying close of this surface with a flat plane. The issue is that the ends are incomplete making it impossible to use a single tool. I believe I am in need of a compound of tools. Thanks for the ...
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2answers
156 views

What's the easiest way to draw the outline of a floor plan in Blender?

This is so easy to do in other applications but very new to Blender and haven't been able to figure out the right words to search for to find this exact information. If I needed to draw this plane ...
3
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2answers
110 views

How can I create a mathematically correct arc/circular segment?

Given 3 vertices, or a chord and height, how can I create a mathematically correct arc/circular segment with an even distribution of vertices while controlling for the number of vertices. I ...
1
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1answer
43 views

Is there a better method to add uniform thickness to a curve pattern that has been converted into a mesh?

I have the following mesh with no thickness or faces: I wish to be able to apply a uniform thickness along with clean geometry without creating too many vertices. The solidify modifier isn't getting ...
0
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1answer
59 views

Solidify non manifold (non contiguos)

I tried to solidify a poligon extrusion, but it seems to be more complex than expected. After solidification some edges seems to cross each others, but I believe this should be a real common result ...
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0answers
16 views

Are there any methods for automating a height map OR cleaning up geometry after a displace modifier

Question 1 (Using the displace modifier): Is there a method, modifier or addon to clean up geometry after using a subsurf + displace modifier, proceeded by a planar decimate modifier without having ...
2
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2answers
86 views

How to improve topology around an E-pole?

I'm trying to find a way to make the area around the E-pole less stretched (marked in blue on the pics below) while keeping the mesh geometry as clean as possible. Is there any solution or method I ...
0
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0answers
16 views

UV coordinate from ray_cast?

I want to get the UV coordinate of a point on the surface of an object. I want to automatically generate new textures for many objects based on code I have written. I was thinking I would call the ...
1
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1answer
64 views

How can I create dynamic brick/tile-like geometry?

I want to create something like this: The key requirements are: Must be actual geometry. I'm going to be 3d printing this, so I don't think using materials will help me here. Would like to be able ...
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2answers
161 views

Apply Transformation Matrix to Existing Mesh

How can I apply a 3x3 or 4x4 transformation matrix to a mesh such that the matrix's transformation is baked into its geometry? E.g. applying the following matrix... \begin{bmatrix} 1 & 0 &...
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1answer
42 views

Apply “backface culling” if the surface is not visible from the given point

Given the point (x,y,z) and meshes scattered around this point in the space, where each triangle on the mesh has its normal known, I want to be able to detect which triangles are not visible to the ...
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0answers
49 views

What happened to my straight lines in 2.8?

I modeled these letters in 2.7 no problem. I just brought them into 2.80 and the straight lines have this "back forth" look along the geometry. The normals are all outside, I tried to re-do the ...
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0answers
36 views

Disassemble this math function pseudosphere into circle strips or/and individual cones?

Is there a way to disassemble this math function into circle strips or/and individual cones? Irrespective of section number depicted. The idea is to print on paper and cut-out.
2
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2answers
136 views

Check if the whole plane is being on a orthographic camera render (or get a proportion of the rendered plane)

Situation: On my scene, planes can be positioned anywhere and I should not move them - I move around only camera. After positioning a orthographic camera with a script, I am not sure if the whole ...
0
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2answers
215 views

Is there a hotkey to subdivide geometry?

I’ve been following this tutorial for a model, and I’m wondering if there’s any hotkey to change an extruded plane (like it was done in the video) from this: To this: If not, do I need to use a ...
0
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1answer
26 views

Is there a tool to remesh an object such that it contains a specified number of vertices?

I am currently making a classifier for 3-D objects that uses vertex data as input, and I am using Blender to create a dataset of 3D objects. For the classifier, I need all the objects to have equal ...
0
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1answer
34 views

Triangle Question

I've noticed that in Object Mode, if you select an object it will tell you how many triangles are in the mesh. However, is there a way to highlight where they are? From what I can see, everything is ...
0
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1answer
53 views

How do I reduce geometry in mesh?

Over the course of modelling, my mesh has gained a bit too much geometry. If I use the Decimate modifier, it tells me I need to get rid of my Shape Keys, if I do that, the modifier messes up my UV ...
4
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2answers
318 views

Square - Octagon - Circle - Modelling puzzle

I'm trying to make a rubber mat that is basically a big flat cube with lots of little holes (cells). It makes sense to me to model each cell and use an array modifier to construct the overall mat. ...
0
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0answers
33 views

Which api/data structure does blender use to represent its meshes?

I am wondering which underlying data structure blender uses to represent its meshes. I tried going through the source code but answering that question myself is harder than expected.
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0answers
58 views

Is there a way to check whether a point is within the convex hull of an object?

I'm trying to calculate to what extent one object contains another in a blender scene. To do this it would be ideal to see if one object is contained in the convex hull of another. I realise there ...
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2answers
55 views

Anyway To Material Paint This Complex Geometry?

So what I want to do is material paint this middle part for a diffrent look, but the geometry is very complex, and I want to make it circular, and able to change in keyframes, so that way I can ...
0
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1answer
332 views

Convert any 3D Game mesh to OBJ for use in blender

There are few games that deliver it's own Development Kit so you can decompile and modify the game assets in this case the geometry of the models by converting them to a general geometry file format ...
2
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1answer
67 views

How to maintain right angles while editing a rotated mesh?

I'm trying to move an edge loop in a mesh that's not aligned to the global axis, but is supposed to have all right angles (since it was created from a cube). Even though I move the loop along the mesh'...
6
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1answer
302 views

Cones on a pointing out from a cylinder

I am very new to Blender to please excuse me if I might use the wrong terminology. I would like to coat part of a sphere will well packed cones. With this I mean that the cones will have two radii, ...
2
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1answer
66 views

Deforming a plane over a topology

I'm a newbie in Blender and I'm testing a numerical algorithm. However, I want to extract the topology distribution of some existing objects in the scene. In other words, I want a surface that ...
0
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1answer
173 views

Blender Guru Anvil Tutorial Base Problem

Ok, so I followed the tutorial pretty much to the letter. I was near the end of video 2. I deleted the bottom face and extruded it together with Clipping and Merge like he showed, then proceeded to ...
2
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3answers
125 views

How do I shift a vertex to establish a single, flat surface on a quad?

One thing that I've noticed when drawing quads is that, if a single surface cannot be established using the vertex arrangement (for example, if you add the default plane and raise a single vertex to 1 ...
1
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1answer
75 views

How can I fix these non-manifold edges (boundaries prior to remove doubles, non-contiguous after remove doubles)?

I am trying to create a ring for 3D printing. Part of the requirements for 3D printing is to not have any non-manifold geometry in your model. When checking whether I met this requirement, I found ...
0
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1answer
152 views

How can I manually fix nonplanar geometry?

I'm going through a course on blender. The course teaches blender through the use of several projects. Right now I'm modeling a low-poly chess set, and we've arrived at the knight. Because we made the ...
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1answer
163 views

How can I thicken the walls of my model for a more sturdy 3D printing?

Good afternoon, I have been trying to print a 3D tile on my XYZ da Vinci 1.0 Pro 3-in-1, with Simplify 3D, but every time I try it seems that the lightness of the walls + the complexity of the inner ...
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3answers
924 views

Is there a “Volume Select” equivalent in Blender?

3D Studio has a modifier called "Volume Select" that allows using an element's geometry as a sort of selection force field that influences elements in its path. It can be used to transform many at ...
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1answer
130 views

How to make texture appear only in dark spots?

I'm trying to make a realistic earth but now comes the problem of the lights. Since I'd like to make an animation I want the night lights(which are just a texture with an emission shader) to "appear" ...
3
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0answers
140 views

Artifacts when rendering irregular mesh in Cycles (black lines)

when I render with Cycles any mesh (specially planes) with a bit of irregular shape (by using previously, for example, a displacement map) some black lines appear on it. Those black lines are not ...