Questions tagged [vertex-groups]

Vertex groups are a group of vertices from a mesh that allow specialized selections and or editing.

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14
votes
1answer
15k views

Some vertices don't move along with the rig

I follow this tutorial which uses rigify and I have run into some issues. Not every vertex moves along the rig. Any idea what could cause this? I applied the location and rotation for every object. ...
14
votes
1answer
4k views

Finding vertices in a Vertex Group using Blender's Python API

Is there an easy way to get the vertices in a vertex group? The only way I've found is pretty brute-force - e.g., to find the vertices of object obs[i] in group "e"...
15
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3answers
12k views

Weight paint in cycles nodes?

I'm trying to use weights from a vertex group in cycles nodes to change the transparency of the mesh. But as far as I know this is still not supported. Is there any workaround that I could use? This ...
14
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2answers
22k views

Locking a vertex group from modification

In a mesh there is a group of vertices which should not move after being positioned once. I would like to find a way to lock them in place for the whole duration of the project. Currently I 'lock' ...
11
votes
1answer
24k views

What are the colored/highlighted edges in edit mode?

There are red and pink edges on my mesh. What do these colored edges mean? How can I use them?
9
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3answers
8k views

Is there a way to save selection by faces

I'm trying to find a way to save selection faces, tried Vertex Group, the issue with Vertex Group is that it adds the faces that are marked by 4 vertices that are added to the Vertex Group, there are ...
2
votes
2answers
212 views

Pin cloth vertices at a specific set of frames, and un-pin otherwise (in python)

I am using Blender 2.82a and am trying to pin cloth vertices only at a specific set of frames. The broader context is to simulate actions on a cloth, where each action is parameterized by a cloth and ...
24
votes
3answers
57k views

How can I automatically generate vertex groups for an armature?

I've been trying to find this on the Blender Wiki, but I can't seem to find the details. I knew how to do it one time but I forgot how to do so now. How do you generate vertex groups for individual ...
10
votes
1answer
4k views

Vertex group from texture

If I have a model, for instance UV unwrapped, how can I from a texture assign a vertex group. White = assign vertex, black = don't assign vertex, values in between = halfway assigned vertex based on ...
8
votes
2answers
8k views

How do I stick an object to another objects vertex?

I just created a plane and added a wave modifier to it, to simply make it look like something fluid. Now, I have an Object that I want to place on the surface of this fluid plane. But how do I do that?...
5
votes
3answers
11k views

How to quickly remove all zero-weight vertex groups?

I wonder what is the quickest way to remove vertex groups in which all vetices have zero weight? Currently I got nearly 100 groups listed there after days of hard working, and I'm sure some of them ...
9
votes
2answers
6k views

Checking if a vertex belongs to a vertex group in python

I'm trying to check whether or not a vertex belongs to a particular group, I've seen a couple methods, I'm wondering why the following does not move any vertices. ...
5
votes
1answer
3k views

How to assign vertex groups and bone weights through Blender's Python API?

I'm making a script to import custom objects, it is still at early stage but so far vertices, faces and uv are created correctly. I want to do weight painting through Blender's Python API but I don't ...
3
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2answers
6k views

(Rigging) Why are some of my vertex groups affecting blue areas?

I'm new to rigging, and am trying to make a low-poly rabbit. I've made the armature and spent the better part of an hour fine-tuning the weight painting only to find out that posing nearly any bone in ...
0
votes
1answer
781 views

When IK bone moved wrong part of mesh deforms

I am pretty new to blender, but I've been digesting as many tutorials and reading as I can get my hands on. I've run into a problem and I can't quite form the question properly for Google to handle so ...
2
votes
2answers
1k views

How to add a modifier to a collection?

My goal is to reduce the faces of an object using the decimate modifier. The object I'm editing has lots of vertex groups. Blender 2.8 only lets me add the decimate modifier to a single group at once ...
1
vote
2answers
589 views

How to get a Center Point from multiple Vertex Locations?

tl;dr: I just want to create some curve guides along those middle points of vertex groups but with a script. I am new to Python in Blender and I can't seem to find how to do this. So far, I managed ...
1
vote
1answer
850 views

How to move a soft body object in the scene towards a “goal position” while physics is active?

I have a couple of soft body objects in a scene sitting on a plane. My goal is to smoothly move one of these soft body objects towards a goal position smoothly while still having its 'base' anchored ...
0
votes
1answer
549 views

Erratic apply-scale behavior with vert groups and displacement modifier

When trying to scale an extruded and assigned faces vert group back to zero on the Z-axis after applying a displacement modifier, it either seems to work correctly, or the entire mesh goes flat, as if ...
6
votes
4answers
17k views

How to mirror copy existing vertex weights

So far I only find option to mirror the existing weights, but didn't find a way to mirror + copy it, I mean, I want to create symmetrical weights on the other side, but I also want to keep the ...
4
votes
3answers
27k views

How to connect a mesh vertex groups with an armature bones

I have this mesh and armature found in this blend file. What I want to do is to connect the bones with the created vertex groups. And I don't want to use automatic weighting option as this will create ...
7
votes
2answers
1k views

Is it possible to unhide only part of a mesh?

So I'm working on a mesh with sub-meshes, and as I work on various bits of the project, I hide other parts to make it easier to see what I am doing. So I work on one thing and hide a few predefined ...
3
votes
1answer
6k views

Assigning vertex groups to bones precisely

I've looked at several answers to this question and none of the responses are giving me what I need. Vertex groups are selected in the armature options, the vertex group names correspond to the ...
3
votes
1answer
431 views

Is it possible to see Vertex Weights in Edit Mode in the 3D View?

Is this documentation simply out of date? Is it possible to manipulate vertex weights in Edit Mode in Blender 2.8?
3
votes
1answer
856 views

How to make a specific area of a soft body behave like rigid body (or vice versa)?

Is it possible to make a part of a soft body mesh behave like a rigid body without pinning the vertices of the object? For instance, following this answer I painted some of the vertices of the soft ...
3
votes
1answer
2k views

Is it possible to use proportional editing without affecting or hiding nearby vertices

Hiding those vertices which are not to be affected makes me uncomfortable to adjust those vertices to be affected according to those which are hidden. So is it possible to affect only the selected ...
1
vote
1answer
977 views

How can i get the weight for all vertices in a vertex group?

I have created this function to get the weights from a group: ...
7
votes
1answer
8k views

Bones moving wrong part of mesh?

I have an armature set up, but the bones aren't moving the mesh properly The mesh and armature: The vertex group of the bone I am going to move: As you can see, the circled region doesn't belong to ...
6
votes
3answers
7k views

Turn weight paint(vertex groups) into vertex paint?

Can I turn weight paint(vertex group data) into vertex paint? I would like to take the weight paint value and convert it into a black and white grey scale vertex paint map.
4
votes
1answer
2k views

How to batch remove zero-weight vertices from vgroup?

It seems that vertices with zero weight will remain in the vgroup by default, and there appears to be no straightforward way to batch remove all zero-weight vertices from it except having to manually ...
0
votes
1answer
153 views

Area of mesh moving along bone despite not being weight painted

I have made a simple character model and am adding a skeleton to it, so i can use it as reference and so i can get a feel for how rigging and weight painting are. The white box (Shoulder_L) has ...
0
votes
1answer
62 views

Creating a batch version of a script that renames Vertex Groups

I have the following code, which creates a button in the panel which when clicked creates a vertex group from all vertices in a selected obj. Is there a way I can edit to so that when I click the ...
13
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3answers
15k views

How to merge vertex groups?

I need this vertex group: additively merged with this vertex group: into a third new vertex group like this:
6
votes
1answer
5k views

How to restrict vertex weights to no more than N number of Bones?

I have a program that can animated a mesh using OpenGL but problematically it can only work and not crash when each vertex weight is affected as per the title to a maximum of four bones. The tutorial ...
4
votes
1answer
5k views

How to have consistent soft body physics in a specific area of an object using vertex groups?

I'm trying to add soft body physics to a small vertex group within a larger object, thus applying the soft body behavior to that small area of the object. My end result will hopefully be an ...
3
votes
1answer
439 views

Overlay Vertex Weights as Numbers in Weight Paint Mode

Is there a possibility to overlay the weights of the active Vertex Group as numbers in the viewport? It would make for a much more precise readout than the color gradients, especially when fiddling ...
3
votes
1answer
372 views

How to make an (open) object behave like rubber when penetrated by another

So uh i've got this problem with a penetrating object and another object that serves as something like a condom if you will So what I want, is for the penetrating object to not deform while moving ...
5
votes
2answers
478 views

Set Material to VertexGroup

I have 3 vertexgroups VG1 VG2 VG3 and 3 materials with exactly the same name VG1 VG2 VG2 as the vertexgroups, how I can assign each material to the corresponding vertexgroup in python? Also how I can ...
4
votes
1answer
6k views

Weight paint front and back faces at the same time

I want to know how to weight paint the back and front and sides of the selected region at once instead of keep changing the view then doing the same thing. So for example if we have a cube in front ...
4
votes
1answer
15k views

Cycles: Assign material to vertex group

I know it's possible to have multiple shaders for one object with the internal renderer. This video explains the process. Can I use Cycles to assign a material to a vertex group so that a single ...
3
votes
2answers
799 views

Is there a way to assign vertex groups to all loose elements via python

I have loose mesh elements within an object and I would like each loos element to be placed in its own vertex group.
3
votes
2answers
792 views

How to remove a common prefix from vertex-group names?

I'm looking to write a script that can remove a prefix from all vertex group names, so that I can use the mirror modifier appropriately. The models I work with have "b_" as a prefix for most group ...
2
votes
3answers
2k views

Increasing topology without affecting shape keys

I have a mesh with multiple vertex groups and shape keys, and I need to increase topology. I'm using blend4Web, which doesn't export modifiers, therefore one should apply them to realize their effect. ...
1
vote
0answers
892 views

BGE Chaging the position of a vertex in real time

I'm using the BGE and I need to change the position of a group of vertex of a soft-body while the game is running. I've tried with the code below but I don't see any change. If I print the new ...
1
vote
1answer
538 views

Hair doesn't follow vertex group

Today I wanted to put some hair on my character. I used weight paint to make a vertex group. The hair particle system doesn't seem to follow the vertex group, though. Can anybody help? (I'm sorry for ...
0
votes
1answer
721 views

How to make this script to quickly set specific weights? (Screenshot attached)

I have an idea how to get a faster workflow when assigning weights in edit mode, and would like to know how hard this would be to make in python as an addon: BEFORE: I'm manually setting weights ...
7
votes
1answer
475 views

Select overlaping vertices from vertex groups

Does anyone know how could I select and view vertices which overlap from two vertex groups ?
5
votes
1answer
1k views

Vertex Group Weight Influence

I'm having trouble with understanding vertex weight influence. As you can see, I have the vertex group painted how I want it. When binding the armature to the mesh, I used ...
4
votes
2answers
3k views

How can I get the names of the vertex groups these vertices are in?

In my mesh I have few vertices which are in more then 4 vertex groups. I know the indices of those vertices, is there a way to get names of those vertex groups? Many tnx
4
votes
1answer
6k views

How to paint through a whole mesh while weight painting

Is there a way to paint through a mesh while weight painting? I have clicked the "limit selection to visible" button, but I still cannot paint through all visible faces in wireframe mode.