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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8 views

how to send property value as a message sent by multiple object?

i was working on a game and i need to send multiple property values from different objects through different scenes using message body set to "property" any ideas ?
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Why not adding crowd people simulation for blender [closed]

Some softwares have crowd people simulations or addons that match them !! But why can't such a powerful blender software add that feature or even create an addon ?? Please add another simulation to ...
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18 views

Can python callbacks be registered on viewport user actions?

Is it possible to have python callbacks invoked when a user does something like select an object, bone, vertex, etc...? For example, imagine a FK/IK setup where clicking on certain bones trigger the ...
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17 views

Box Cutter bevel works strange

I ran into this problem: when I make a cut through the box cutter and press B to create a bevel, it's created in some strange shape. The bevel is not symmetrical and is created on different edges.
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2answers
16 views

Evaluate FCurve without keyframes won't work

i'm stuck here, i'm trying to evaluate a newly created FCurve to get the current value of associated property, and keep getting "0". Here's an example working code with scale: ...
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25 views

Failed adding custom icon for add-on button [duplicate]

How I add custom icon for add-on button? I have ready a 32x32 size photo for my icon but dob't know how to add it I have copy the code of: How to implement custom icons for my script/addon? But when I ...
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1answer
9 views

How to toggle(Open/Close) `T` or `N` Panel in 3D view Using Python

I want to hide or show blender T and N panel using Python. From This To This
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14 views

Addon Preferences with Lists [duplicate]

I would like to add an addon preference setting to the user preferences for my addon. I would like to have a list there where you can add and remove things (at first only Strings). This sets it up: <...
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2answers
64 views

How to interactively add vertices based on custom input fields?

I want to make UI with input fields and a button which add verts with coords based on values in this fields. I kinda almost understand what I need to do but it slips away because I am not a programmer....
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1answer
41 views

Class already registered as subclass?

I'm trying to create an addon. I'm able to run the script from the text editor but when I to try install it via User Preferences, I get the following error: bpy.utils.register_class(SmoothMonkey) ...
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25 views

How do you properly store references to objects in Blender? (Python API question) [closed]

I'm working on a plugin and I am trying to figure out how to store references for appended emtpies, so I can use the plugin multiple times instead of using it once and I don't know what the pattern is ...
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14 views

MeasureIT add-on: how to display edge's projection on an axis

I have a tilted edge. Selecting its vertices as segment for MeasureIT addon displays edge's length. I would like to see the length of edge's projection on the Z axis ("height"). See this ...
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1answer
21 views

Perform same action on all selected objects

I am trying to write a simple code that should perform the same action on all selected objects in Blender. For example, let's assume that I have two MESH objects in my scene and I want to print the ...
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18 views

How to install rigacar addon? [duplicate]

I downloaded rigacar addon but when I try to install the add-on in preferences it simply gives me a blue message with the location details of my computer. I cannot find anything when I look for it in ...
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Import brush add-on error [closed]

I am following this tutorial and activated brush importing addon but it made error. what's problem? ”ディレクトリ名が不明です” in error code in second picture means "The directory name is invalid" . ...
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20 views

Is there a tool, addon or modifier that creates a 3D model from Grease Pencil just like Smoothie-3D / Paint 3D / Monster Mash?

I want to find some way to imitate this technique. (draw a curve that becomes a model with a few clicks) The same can be done with Paint 3D as seen here and Monster Mash as seen here. The most I can ...
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17 views

Storyboarder's shot generator but in Blender

so I am using Storyboarder to create storyboards, and I mostly use the shot generator feature but it is quite limited and navigation is a nightmare, so I was wondering if there is some addons that ...
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1answer
42 views

Is it possible to make a scrollbar? [duplicate]

How to make a scrollbar in the tabs in the 3D view sidebar using python ?
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1answer
34 views

Is it possible to make a scrollbar? [duplicate]

How to make a scrollbar using python ?
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1answer
29 views

How to recalculate bone transforms/constraints to originate from armature origin point?

I'm trying to make an export script, and I need all the exported bones to be positioned at the armature's origin point. The trouble is that I would like to be able to position the bones anywhere in ...
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2answers
57 views

Knife tool perpendicular cut

While working in maya for a long time, i'm slowly start to explore blender and adore it tools, but when i start using knife tool i couldn't find an option that been used all the time in work, and it's ...
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13 views

I have blender 2.91.2 portable but i do not have boxcutter in preferences . What should I do?

I have blender 2.91.2 portable in my computer but I do not have boxcutter in preferences . What should I do?
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1answer
25 views

Cancel addon registering

I am developing an add-on, which only works if some specific conditions are satisfied (e.g. some other add-on is installed). Hence, I want the user to be unable to register this add-on if the ...
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65 views

How to dynamically load a .dat icon (toolshelf icon)?

Using documentation here 2.80/Python_API/UI_DESIGN, I've managed to create a custom .dat tool shelf icon for use with an operator in my addon. The icon will display from my addon when registered from ...
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1answer
28 views

Invoke the File Browser inside an Add-On but wait with the rest of the script until it's closed

I'm writing an Add-on in which I create a new Collection and then invoke the ImportHelper to load an FBX file. After that I would like to process the loaded data. My Problem is, that my script doesn't ...
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1answer
41 views

Why have I got an extra vertex when exporting to ply format?

The following is a very simple object in Blender (that I have cut out from a much larger object in order to highlight where the issue lies). It has nine vertices and four quad faces. There is vertex ...
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1answer
25 views

Change the export stl file code from Exported from Blender-x.x.x to object name

I want export model into stl format in ASCII, which Blender can do. However when I open the exported stl file by text, the first line is always like this: solid Exported from Blender-2.91.2 And the ...
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3answers
25 views

Joining instead of Cutting with BoolTool Ctrl Shift - Shortcut

I have been using Blender to edit STL files for resin 3d Printing. I have an object that I want to cut and I create the shape I want to cut out of it, but when I give the ⎈ Ctrl+⇧ Shift+ - command, ...
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0answers
19 views

BlenderGIS: importing georeferenced .tif DEM into Blender [closed]

I am new to Blender, and I am just trying to put a Structure from Motion produced DEM .tif into blender, but keep getting this error: struct.error: unpack requires a buffer of 4 bytes. What do I ...
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15 views

Add-on hierarchy

I am trying to create a family of add-ons, all of which use the same asset library. That means, all add-ons will use the same path to the asset library, and I want the user to specify that path only ...
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29 views

Cannot import nested Python module when writing an add-on

I am working on my first add-on, though I am pretty experienced with Python having written multiple apps using Django. My project structure looks like this: ...
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33 views

Smooth blend of shape keys

Well, this is my first time here, and I want to ask a question regarding shapekeys. I want to know if it exists an addon, script or another manual way to get a more smooth blend of multiple shapekeys ...
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1answer
23 views

Blender API… “context is not defined”

Good morning, I am currently updating an older AddOn and it went very well so far, but now im stuck with an error and I can't find the reason since my knowledge in Python and especially in the Blender ...
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1answer
19 views

How do i start the rigid body dynamic in the keyframe i want? [duplicate]

I’ve been trying to animate a blowing skull, but, when i try to add the active rigid body dynamic, it stars from keyframe 1, when what i want is to start it in the keyframe 267.
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1answer
35 views

Simple Addon 50 lines - Crash blender - what I do bad?

I start to learn Python and Blender. But can't figure out what I do bad here. The code is : ...
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0answers
20 views

Call update function when initializing a custom property

I am writing an add-on with a panel UI, in which I want to have a drop-down list of all objects in a specified .blend file, so that my operator could append the selected object. I've managed to do ...
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0answers
16 views

error: return super().__getattribute__(attr) [closed]

I try to run the following script from the tutorial (https://youtu.be/bZUTiAJ1Tuc). While I try to execute a grid by clicking on a respective button panel I get the following error message "......
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24 views

Is there an addon that shows the NumPad on the screen when entering numbers like object size in Blender?

I want to show the NumPad on the screen like this image when I enter a number such as object size. (I made the NumPad in this image by myself using Python's Tkinter, but it doesn't work well yet due ...
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23 views

Add ons not installing/showing up in Blender 2.91.2

I'm using Blender 2.91.2 and I've been trying to install this add on that I bought. I tried to install it in User Preferences, but nothing ever shows up/reacts when I do. I've tried installing just ...
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21 views

Can we use blenrig 5 on blender 2.9x, or has it become obsolete?

I want to use blenrig for my character in blender 2.9x and upcoming versions, If blenrig is obsolete, then suggest me similar industry standard rigging add-on
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1answer
58 views

How to force a redraw of a panel in the 3D_View

I have a panel in 3D_View that shows the current file and allows the selection of a new file. When the file is selected, the panel needs to redraw. How do I force a redraw? In Operator.py file ...
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0answers
22 views

How do I stop Flip-Fluids generating smoke/fog effect over the water?

I just recently got started with Flip-Fluids in blender and it was working fine for a bit, but then I found that there was a fog generated over the liquid. I am trying to generate a fog inside the ...
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1answer
25 views

Import Image as Plane Without Cropping

I'm using the Import Image as Plane add-on to import RGBA PNG-24's. My issue is that the add-on automatically crops the planes, which changes the images' location relative to the world origin. As you ...
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0answers
36 views

Per-Face Vertex Color from Image Texture

Is it possible to convert a UV mapped image texture into per-face vertex color? I found this script that can generate Per-face vertex color from Normals of 2.79, or an add-on Bake vertex color, but it ...
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17 views

No idea why the loop tool is not working here

No idea what's wrong here. It is just deforming in a strange way and I have no idea why.
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1answer
44 views

Detect user event (bpy.types.Event) anywhere from blender?

In blender interface, when multiple objects are selected if we press "ALT" on the keyboard while changing a property, the behavior of the property execution change (in this case we can batch ...
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15 views

I have a problem with addon Spark AR Toolkit in Blender [closed]

I have a problem in Blender 2.9. WhenI click anywhere in the workspace and an error appears. ...
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0answers
19 views

How to find the UI code for a node/modifier

I want to be able to see the UI code for modifiers and nodes, which "edit source" doesn't work on. It instead gives the error "Active button is not from a script, cannot edit source&...
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1answer
45 views

Blender not importing openings from doors or windows from IFC file

I want to import an IFC file exported from REVIT, using the BlenderBIM add-on. Once in Blender, some openings (doors and windows) are not imported, and window and door families are imported embeded in ...
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19 views

Cell Fracture Add-On Automatically Decimates Base Mesh

Wondering if anyone here can offer some advice on the Cell Fracture add-on. I am trying to fracture some very high-poly triangulated 3D scans but it seems that the Cell Fracture add-on takes it upon ...

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