Questions tagged [add-on]

An add-on is a python script or plugin created to expand Blender's functionality. There are many add-ons in the official builds of Blender, and with every new version comes new add-ons.

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77
votes
3answers
50k views

How can I quickly generate / create a large city without modeling it all by hand?

I am trying to create an urban open-world environment in Blender that would be about one square kilometre in size. To avoid having to model hundred of individual buildings, I am looking for a way to ...
39
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2answers
155k views

Installing an addon

There is this addon that was built called Window Generator 2. It can be found at this BA thread. However, when I go to the download link it shows up in a new tab as a bunch of code. How can I ...
27
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3answers
13k views

How can I generate an object from a mathematical function?

I have a formula that mathematically describes the heart surface in Cartesian coordinates: $$\left(x^2+\frac{9y^2}{4}+z^2-1\right)^3-x^2z^3-\frac{9y^2z^3}{80}=0$$ Unfortunately, I have no idea how ...
26
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1answer
48k views

How do I display what keys I use?

Basically, what I'm saying is, I've been watching a Blender YouTube tutorial (or something like that), I saw that a lot of users had something at the bottom-left of their main 3D view that created a ...
25
votes
3answers
16k views

How to do photogrammetry within Blender?

Photogrammetry is really frustrating. The good tools are really expensive, and the free tools are either really old, or really difficult to get working because they're pet-projects... or they're ...
24
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1answer
7k views

How to implement custom icons for my script/addon?

Is it possible to use different icons other than the default set and how?
23
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3answers
11k views

Is there a way to restart a modified addon?

I'm currently twiddling with an old addon and insert some print statements for debugging. Currently I'm restarting Blender each time to see the new messages. Is there a way to 'refresh' an already ...
22
votes
3answers
4k views

Scrolling credits

I used blender as all in one application. I model, animate and compose in it. Now I need to add a simple scrolling credits at the end on an animation. I want to know if there is a easy way to make ...
22
votes
1answer
15k views

How do I copy a property from an active object to selected objects?

I have been using the Copy Attributes add-on to copy some properties from active object to selected objects. This add-on is not enabled by default and must be explicitly enabled. But its a very useful ...
20
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4answers
8k views

Objects other than leaves with Sapling addon?

The Sapling addon does an excellent job of modeling the shape of the trunk, branches, and leaves of a variety of trees, and can be used to quickly produce realistic trees in my models. However, real ...
17
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4answers
8k views

Is there a way to make comments in the node editor?

I'd like to have a node like the Frame node but one that can have lots of text, not just a header. I've looked and it looks like there isn't any such capability so far, so I was wondering how easy it ...
17
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1answer
7k views

How to add empty object not using bpy.ops?

How to add an empty object with python using bpy and not using any ops? My code so far is doing this: ...
17
votes
1answer
9k views

How to make a curtain

In the addon ArchiMesh there is a Japaneses curtain feature, but, it looks straight and does not have the fold that I want in it. Is there an addon that can do this for me? If not, how can I make a ...
16
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4answers
4k views

Workflow for developing add-on/script

I'm trying to figure out a good workflow for developing scripts and add-ons in Blender. Here's what I'm currently doing as I try my luck with a PyNode add-on: Open blender Create a text editor panel ...
16
votes
2answers
22k views

Archipack window not showing anything

I haven't tried Archipack previously but anyways, after going like this: and when I click on Windows it shows up this black patch in middle of the viewport: I tried Wall and it worked well as it added ...
16
votes
1answer
4k views

How was that render created with Tissue add-on?

So the makers of the Tissue addon for Blender (for Tesselation) have uploaded this picture on their website co-de-it.com under the topic of the "Dual Mesh"-Functionality in Tissue: Since I am fairly ...
16
votes
1answer
4k views

What do new bpy class naming conventions in Blender 2.80 actually mean?

What are the new class naming conventions in Blender's 2.80 Python API for add-ons? It says here: This constraint applies to the bl_idname of each class (or the ...
15
votes
1answer
3k views

How can I get a list of the installed addons using the API?

How can I get a list of the installed addons and the version number so I can print out and use as a simple reference when checking for updated scripts? I've looked at ...
15
votes
3answers
1k views

Add a custom curve mapping property for an add-on?

Question The title says it all. I want to be able to make this in Blender's UI, and sample it at specific points from an add-on: Problem There is very insufficient documentation on this, and I can't ...
14
votes
3answers
2k views

How to cover a surface with cells (Biological tissue)

I am looking for an efficient way to cover a mesh with cells (spheres) to obtain results similar to the image below (i.e. a realistic biological tissue). It's a problem I have struggled so much and ...
14
votes
1answer
8k views

Where is the BSurfaces project living now?

It would appear that www.BSurfaces.info the web site for the retopologizing tool has gone down and was gobbled up by a dentistry practice. Where is the project living now? Has someone put the code on ...
14
votes
1answer
4k views

Proper way to show users error info in the UI for addons [duplicate]

Are there standardized features in the python API for displaying the popup and error message that users typically see in Blender when they're not doing something the right way? Trying to apply a ...
13
votes
4answers
14k views

List of objects in scene with counts (verts, faces, tris)?

Is there a way to see a list of all objects in the scene with the number of verts, tris, faces of each object? I know you can click on a object and go into edit mode and it shows the numbers, but if ...
13
votes
1answer
26k views

Arrange selected vertices in a Circle [duplicate]

How do I arrange selected vertices into a circular formation quickly? The other answers does not have the same title as my question. My question is direct and simple for younger beginner to search ...
13
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2answers
4k views

Why does operators bl_idname have to contain 1 dot?

Since anything before and after the dot is arbitrary, why bother? Related error: ...
13
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2answers
1k views

Getting pynodes geometric node to work

I downloaded the geometric node from git, and copied it in the addon folder of blender 2.67. Tried with 2.67b and a self-compiled svn version, in both, I can't enable it in the user preferences. Does ...
12
votes
3answers
2k views

best practice for add-on generation with many functions single file or split it up?

This is quite a theoretical question. A simple function can remain inside an add-on text file. But what if you have many functions and your text file gets very long. Would it be better to split each ...
12
votes
1answer
4k views

Addons: Only some .zips will install

Why is it that if I go to install an add-on from User Preferences > Add-ons > Install from File... and choose a *.ZIP, some add-ons will install, while others will return me to the User Preferences ...
12
votes
1answer
307 views

Can unofficial Blender addons be included in a project as a text block and automatically register on load?

I am a keen user of Bassam's typewriter.py addon. It's not part of the official distribution, so I thought I could make my .blend projects more portable by including it as a text block. I always need ...
12
votes
1answer
1k views

How to identify a keymap conflict?

I can't access the Clipping Border command (Alt+B) with my standard Blender setup. When I load factory settings everything works okay, so I presume there must be an addon that conflicts with this ...
12
votes
1answer
4k views

Importing PNG series with Import Image as Plane is blurred and has artefacts

I am using a series of .png images (from green screen footage) with alpha channels. However, when I try to import image(s) as plane(s) in a rendered scene, the image is blurry with anti-aliasing off. ...
11
votes
3answers
997 views

Is it possible to control a value in all of my materials with one click?

I have a few materials that are slightly different but all have an emission shader. Whenever I want to control the strength of all the emission shaders I have to go into each object's material one by ...
11
votes
2answers
5k views

How do I space quads evenly?

Is there a way in blender or an addon that allows me to select a bunch of faces (or verts) and evenly distributes (or relaxes) them into quads clean quads. Without screwing up the vert ID/order. ...
11
votes
2answers
1k views

How to write my add-on so that when installed it also installs dependencies (let's say: scipy or numpy-quaternion)?

How to write my add-on so that when installed it also installs dependencies (let's say: scipy or numpy-quaternion)? Does blender understand setuptools (setup.py)? Thanks, Note: I'm using blender 2....
11
votes
2answers
2k views

How to change icon in Add Object menu?

It has always bugged me that Blender add-ons (in this case the Sapling add-on for generating trees) have a wall socket as their icon in the Add menu, instead of something more custom. I would like to ...
11
votes
1answer
710 views

What is network renderer?

There's this addon called network renderer, and I have no idea what it does. I can't find it on the web. So what is it?
11
votes
1answer
2k views

How can I call a specific keymap to draw within my AddonPreferences?

The add-on I've written defines several custom hotkeys, allowing the user to call custom menus created by the add-on. To be more user-friendly, I'd like to make it easy for the user to change the ...
11
votes
2answers
474 views

Reliable path for add-on data storage

How can I use the python API to find the most reliable location that an add-on can use to store data like images, assets, etc. automatically? It's important that this location: doesn't change for ...
11
votes
1answer
321 views

Increase Cloud Evolution Speed?

I am trying out the Cloud Generator AddOn that comes with Blender 2.67. I have created a a single cloud and selected the CloudPointDensity texture. Under Turbulence I have changed Influence from ...
10
votes
2answers
51k views

Is there an easy way to make a tree in Blender?

Is there an easy way to make a tree in Blender? I'd like to have branches that have smaller branches that branch off, but I don't want to go through all the trouble of modeling each branch by ...
10
votes
3answers
5k views

Object selection box in addon

In my addon panel, how can I have an object selection box? And what data type would I use to store the the selected object? It should look like this:
10
votes
3answers
74k views

How to delete unwanted material?

How to delete unwanted material and texture used in my scene? I have an interior scene and when I press shift+Z it renders in a good way, but when I press F12 a small render shows up and it's stuck ...
10
votes
1answer
1k views

What is Animation Nodes addon used for?

What is Animation Nodes addon used for? Where can I find more information about it?
10
votes
4answers
2k 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 ...
10
votes
1answer
1k views

How can I move an object using NDOF?

I have a 3DConnexion SpaceNavigator. It works very well for moving the viewport. Is there a way for it to place an object in the scene? Is this something that can be accomplished via an addon? I am ...
9
votes
4answers
2k views

Is there an addon for renaming an object with a keyboard shortcut?

I want to use a keyboard shortcut to bring up a text field for renaming the active object. As far as I know, currently no such shortcut exists, and making one will require an addon. I seem to ...
9
votes
1answer
3k views

script custom previews in a menu

I want to know how to create a menu with previews for an add-on. Until now I know that this is related with the bpy.utils.preview. I'm making an add-on that appends ...
9
votes
3answers
1k views

Is there a way to execute code before Blender is closing?

My add-on needs to do some clean-up action before it is ended. This is done in the unregister() function in __init__.py when the user unchecks the add-on in Blender'...
9
votes
2answers
560 views

Operator.report outside operators

Is there something similar to calling self.report inside an Operator, but for use without Operators (i.e. from bpy.app.handlers ...
9
votes
1answer
3k views

How would you hide the cracks in cell fracture?

I was watching a video (link to video) video and you could only see the shards where the places have hit the ground, but when I do cell fracture you can see the cracks before they've impacted with ...

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