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29,341 questions with no upvoted or accepted answers
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41
votes
1answer
2k views

Custom trackpad pan/zoom/rotate behavior add-on

I'm trying to write an addon to customize the trackpad panning, zoomimg, and rotating gestures, but can't find a way to read the actual trackpad parameters for position and so on. The properties in ...
22
votes
0answers
927 views

Property Panel Custom Popup Menu when user presses hotkey over an input field

is it possible to trigger this kind of menu: in the property panel when I press a hotkey over a button/input field? I want to specifically,when the user presses a specific hotkey when over an input ...
19
votes
0answers
711 views

How to make a dynamically expanding menu in Blender?

Say we want to navigate a tree structure without knowing all the data ahead of time, is it possible to do this in Blender? For example, a menu which dynamically loaded a directory hierarchy from the ...
14
votes
1answer
2k views

Per-Vertex lighting in GLSL?

How can I achieve per-vertex lighting (like in single/multi-texture shading) in GLSL with all of the other GLSL features (like buffer shadows, texture layers, etc.)? Bonus points if it can be done in ...
12
votes
0answers
379 views

Generated Previews - low-resolution and dark shading fix?

(2.79 - Blender Internal) Generated Previews is very handy feature for previewing assets when importing / linking, I would just like to know if there is a way to: Make thumbnails lighter to match ...
12
votes
1answer
2k views

How does blender calculate poseBone.matrix?

How does blender calculate a poseBone.matrix through the hierarchy chain? A bone's final matrix is a transformation matrix which defines the bone in armature-space in the current pose (M1). I want to ...
11
votes
1answer
278 views

Set Active FCurve in Graph Editor through python

I'm trying to set an FCurve in the Graph Editor to "Active" through python. In the API FCurves don't actually have an "Active" property, but manually click-selecting a channel or keyframe on an ...
11
votes
1answer
1k views

Apply force along normals of cloth mesh

I'm trying to simulate an inflatable mesh by applying a force field to a cloth. As air pressure always acts perpendicular to a surface it might be a close enough approximation when pushing all ...
11
votes
1answer
2k views

Linking object data without changing rotation?

I have multiple objects that I would like to all use the same mesh but maintain their individual rotation positions. As it is, when I link their object data, all the objects rotate to the same ...
11
votes
0answers
357 views

How to call original operator from operator's override?

I would like to amend functionality of an existing operator with a condition check and then "proceed" with the original operator (if condition check allows it). It is essentially what is ...
10
votes
0answers
742 views

Stencil Image low resolution

I am trying to texture paint a mesh using a pretty high resolution stencil image.. But when I try to zoom into the image to paint the details...it appears as if it was very low res... Is there any way ...
9
votes
0answers
180 views

When is the depsgraph_update handler triggered? (and how does the depsgraph work? )

I've been looking at the depsgraph changes in the documentation here, but I don't know if I understood it right: the dependency graph is a sort of diagram that links data blocks to each other so that ...
9
votes
1answer
628 views

Change multiple custom properties simultaneously

When I ⌥ Alt LMB on a transformations property, I can change multiple the property for multiple object with once input action. The property turns blue for the duration of the operation. Is ...
9
votes
0answers
1k views

Does a model exporter embedding materials as GLSL scripts exist?

as described in Blender Shader in OpenGL/GLSL, it is possible to export the (unoptimized) GLSL code generated by Blender for a given material. Since the viewport can use such GLSL for real-time ...
9
votes
0answers
470 views

Save screenshot (bge) without writing to disk

This is a little odd but I need to save a screen-shot as an array (numpy array for eg) without writing to disk. The idea here is to create and then call the array once per frame in an external script ...
8
votes
0answers
86 views

Floating point precision problem with transparency?

I guess this is a question of understanding, but perhaps I'm overlooking something which might solve my hassle with rendering of objects with transparency in cycles. I'm working on a project with ...
8
votes
0answers
167 views

How can I get a list of currently running modal operators?

Here I found a working solution using ctypes which allows to find out if any modal operator is currently running. I am not good in C and don't understand how it works. But I'm sure someone does, so is ...
8
votes
0answers
110 views

Play/animate images, spritesheets or video files in 'template_icon_view'

I want to "play" some animation in this UI space, the template_icon_view: I can load all the images I want, for example: I know that the gif format is ...
8
votes
0answers
78 views

how to write a custom projection type?

Is it possible to create a lens shader with EEVEE/Cycles ? I'd like to have the control over the camera position and the ray direction per sample. This allows to simulate various conventional lens ...
8
votes
0answers
284 views

3D Stereo Active shutter vision LCS glasses realtime viewport?

Is it possible (or maybe already implemented by someone) to configure the viewport to display stereoscopically at a set frequency dependent on the given screen refresh rate, while having the frequency ...
8
votes
0answers
286 views

Blender on Windows is skipping python script. (brenda on windows)

We've been using Brenda for quite some time now for rendering architectural stills. Since our editing stations are doing nothing at night, I started making a desktop app that allows you to pick jobs ...
8
votes
0answers
636 views

How to bring the context “back” after running read_homefile()?

When I run import bpy bpy.ops.wm.read_homefile() and then I replace the above with this (in the same text data block) ...
8
votes
0answers
1k views

Seamless Procedural Texture in Polar Coordinates

I've written a Cycles node tree to convert rectangular (X,Y) to polar coordinates (R,theta) as the basis for a procedural texture with radial symmetry. However, there is a seam in the texture where ...
8
votes
1answer
1k views

Antialiasing textures in cycles (Blender 2.77 and higher)

I would like to get an answer to a frustrating question. https://wiki.blender.org/index.php/Dev:Ref/Release_Notes/2.77/Cycles In this link is "Anti-Aliasing is now enabled for baking. (c359343)" ...
8
votes
1answer
320 views

How to load an internal blender image using OSL?

OSL has the texture command that we can use to load image files and map in an object. Dfelinto made a nice video about it some years ago. https://www.youtube.com/watch?v=V5N2rnFtSlw We also have many ...
7
votes
0answers
99 views

Is it possible to pass a [color ramp] to a node group?

Are there any addons or other features in Blender that allow the Blender user to write nodes that passes in color ramps and reuse them in a group node? If the answer is yes, then what are the steps? ...
7
votes
0answers
179 views

How to redraw status bar in Blender 2.80

I've added my own progress bar to the Blender 2.80 status bar (the footer of Blender) with the following abstracted code: ...
7
votes
1answer
480 views

Trails Behind Projectiles

How would I add comic-like trails to projectiles, such as arrows? I have an example from YouTube, but the effect is done in another software. https://www.youtube.com/watch?v=K4lmGGSsFYg The effect ...
6
votes
0answers
33 views

Is there any way to convert generated volumetric shader into the mesh?

Now that we've got Volume to Mesh modifier - which is so cool - we can make meshes from the simulations, like Open VDB sequences, etc. But it seems that it doesn't work with procedurally generated ...
6
votes
0answers
122 views

Flip Normals with Geometry Nodes

I have geometry being created through geometry nodes and I am am trying to flip the normals on this duplicate geometry. However, it appears that normals are a read only attribute in the geometry nodes....
6
votes
0answers
55 views

Is there a way to create a dual mesh using geometry nodes?

I'm trying to create a dual mesh, as described by Alessandro Zomparelly, but procedurally using Geometry Nodes. I've only come this far, but now I need to dissolve the vertices of the original mesh, ...
6
votes
0answers
48 views

Advice on modeling stereographic projections?

Hoping to get some advice on modeling stereographic projections. I found a pretty manual process but it doesn't hold up if the model gets too complicated. To clarify, I'm working with meshes because ...
6
votes
1answer
107 views

How to procedurally model a non-linear screw? / non linear modifier

I am trying to achieve a non linear (gradually) screw procedurally, by this I mean the distance between each turn of the screw get smaller and smaller, this result should be obtain with modifier in a ...
6
votes
0answers
54 views

Rendering large image sizes in Eevee (Over 64k pixels)

I am working on creating a wrap for several walls spanning 25 to 60 feet long. People are going to be looking at these fairly close so I don’t want to go below 200 dpi for my final print quality. That ...
6
votes
0answers
47 views

Is there any way to turn coordinates into curve?

I recorded fly camera movement, so I got keyframes with coordinates. Is there any way to turn the camera coordinates in keyframes into curve?
6
votes
0answers
282 views

Curious to Know Official Names and Meanings of Various Properties (Custom, RNA , ID, etc.)

I sometimes find it difficult to recall what type of properties a Blender user or addon has, as well as what choices it brings. ("Set Driver", etc.) I know there are clear differences ...
6
votes
0answers
784 views

Blender 2.8 Outline Width is still thick on setting 1?

I truly wish I could avoid having to ask for help on things like this... In Blender 2.8 object mode the wireframe displays with an extra thick outline. If I go to the outline width (default 2) and ...
6
votes
0answers
6k views

How can I bake a normal map with smooth, beveled, edges, when the low poly has sharp ~90° edges?

Background I have been trying to solve a seemingly simple problem with normal map baking in Blender 2.9 since last weekend. I wanted to make sure that I read and researched as much as possible before ...
6
votes
1answer
1k views

Vertex Normals different from loop normals

I'm writing a model exporter in Blender 2.77 and except from triangles and vertex positions, I also want their normals and tangents. As an example, I'm using a simple cube centered at the Origin (0,0,...
6
votes
1answer
247 views

How to speed up loading of custom external icons?

I have developed a little addon that provides icon button in the node editor. We have 80 node items. And so i have 80 external icons to load. I use custom_icons.load for that. The problem is, every ...
6
votes
1answer
1k views

How to update compositing nodes via script?

I create some nodes in compositing via python script: ...
6
votes
2answers
376 views

Why does this add shader create so much noise?

This question is based on the shader in this answer. When I render the scene using plain glass for the material ball, it takes about 500 samples to converge. Here is the node setup and the result at ...
6
votes
0answers
593 views

Add custom textures and vertex attributes

I'm a new user of Blender, but I have 10 years experience of 3d development (mainly C++/OpenGL, but I know Python pretty well). Now I plan to use Blender as a replacement tool for the "good old ones ...
6
votes
3answers
501 views

Global Slow-mo effect - Animating Time scale

Is there a way to animate the timescale of a scene for a small amount of time? I'm looking to create an animation, and in the middle it goes from 1.0x speed, to 0.125x speed (1/8th normal speed), but ...
5
votes
0answers
32 views

What is armature parent type in object relations

I'm very familiar with the Object and Bone types when I parent objects. But I'm not sure about the Armature type. In fact, even if Ctrl+P, Armature Deform manipulation parent the mesh to armature, ...
5
votes
0answers
50 views

Creating a painterly effect using Geo Nodes

In short, I want to give a painterly look to my objects. A pretty big issue I've been hit with so far is how to assign the instanced objects to essentially show the material of the object they're on ...
5
votes
0answers
46 views

Finding which addon an operator belongs to

A recent question / answer involves what looks like an overridden operator bpy.ops.object.align() differing from the documented default, how do we find which addon(...
5
votes
0answers
106 views

How to create a growing bacterial colony?

So, I've been trying to create a short 3D animation of a bacteria dividing|splitting itself multiple times like this I adjusted some shape keys for it, but I think it would be too overwhelming to ...
5
votes
0answers
45 views

Is it possible to combine rigid body and soft body physics in the same object?

In blender as most of you know there is an option in the animation tab to have soft body and rigid body physics on an object. On a project that I am currently working on I need soft body on one part ...
5
votes
0answers
225 views

Scale operator icon OR make template_icon clickable

I am trying to present the user with a gallery view to select a item from the thumbnails. Ideally, they click a button, are presented with the gallery view, and with a single click choose the item. I ...

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