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24,826 questions with no upvoted or accepted answers
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votes
0answers
170 views

Can Blender Internal Render passes be put back together again?

I'm stuck with a simple task. I need to tweak some render passes of the image, and then put them back to the combined composited image. For Cycles I use this scheme from the manual: It works as ...
5
votes
0answers
300 views

Update function for NodeSocket?

How do I set a callback for socket input change (value or link change) when having a custom node? I have a socket defined like: ...
5
votes
0answers
116 views

How does “Flip Normals” affect Face Corner Data?

I use the "Normal Edit" and "Data Transfer" functions a lot, therefore I'm working with custom Normals with Face Corner Normals that differ from the Vertex Normals. The Pink lines represent the Face ...
5
votes
0answers
124 views

Why does Select-All in Face-Select mode also select isolated edges?

Blender v2.79. Let's say I have to extrude all faces of this planar construction containing two edges not included in faces, and one isolated vertex: In this object, there are not hidden ...
5
votes
1answer
152 views

Smoke Simulation Vibrating

Last week I started making a volcano that was starting to erupt. I've got some sparks and I made a nice smoke simulation. I clicked Bake All Dynamics and then rendered. The result was a nice volcano ...
5
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0answers
275 views

How do I colour a fluid simulation in Cycles based on velocity?

I want to assign a gradient to the water simulations I have. I want to do this by the velocity in the current voxel, so the fastest moving areas will be red and the slowest blue. How would this be ...
5
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0answers
7k views

How can I achieve a Japanese style cell animation toon shader look in Blender?

Here are my examples. Edit// Here is a video showing what I want exactly, how "shaders" and "renderer" should work. https://www.youtube.com/watch?v=XQLgn9-xqQc notice how easy it is to set the ...
5
votes
1answer
379 views

Modify a single plane mesh to match image based on alphas, create shape keys

My goal is to create the shapes of continents as they drifted from Gondwana to the present day. My proposed approach follows, but I would welcome alternate approaches or comments on this approach. I ...
5
votes
1answer
270 views

Why Cloud texture has square cell pattern?

When I am using Cloud texture as bump map in Blender Render, this cells appear. How can I make them go away?
5
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0answers
455 views

PyOpenGL and VBO Indexes

Long story short, I'm trying to do a modal handler that draws using OpenGL into the viewport. Immediate mode through BGL works fine, but is dog slow. I tried using VBOs through BGL but there seems to ...
5
votes
1answer
371 views

Corrupted UV map on exported and re-imported object

I have a problem with an object texture I import the object as obj and it's fine with the texture. But when I export the object and import it again with another form or type it's texture gets corrupt ...
5
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0answers
2k views

How to convert image pixel values from 8bit to 32bit properly? - answered.. but why byte image buffer is stored with non-linear color values?

I'm testing code from this question: `` import bpy ...
5
votes
1answer
271 views

“Search for unknown operator” On Start-Up After Removing Module and Shortcuts

For lack of a less drastic alternative, I created a whole module just for setting bpy.context.window.screen to a specific screen, since ...
5
votes
0answers
777 views

Import and render raw volumetric data

Is it possible in Blender to import and render raw volumetric data (outcome of fluid simulator)? I have a set of 3d arrays of floats in C/C++ and I used to render it frame by frame with OpenGL using ...
5
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,...
5
votes
0answers
118 views

What do all of the mode enums mean?

What do all the various mode constants in blender operators documentation do? bpy.ops.object.duplicate(linked=False, mode='TRANSLATION') - Duplicate selected objects Parameters: ...
5
votes
2answers
769 views

How to Switch Cloth Object Ready for Sewing Simulation into Printable Template

I'm making sewing patterns in blender, i.e. several pieces of flat fabric. Typically I create each piece as part of the same mesh object, and join them with edges so that the cloth simulator will sew ...
5
votes
0answers
77 views

Standalone player enter key is considered a character (Linux)

What happens in the 'in-Blender' player: What happens in the 'Standalone' player: Any ideas on how to fix this?
5
votes
1answer
164 views

Cannot mix .user and .addon keyconfigs in register()

I've been messing around with keymaps lately and I've come across behavior that doesn't make much sense to me. I am searching the current keyconfig for a specific keymap item, removing it, then adding ...
5
votes
2answers
603 views

Relative and Absolute shape keys on the same mesh

is there a way to use both relative and absolute keys together on the same mesh ? i want to use absolute keys to deform muscle in a way, and relative to animate face shapes. both on the same model.
5
votes
1answer
3k views

Blender scene animation exported to Three.js without bones or skinning?

I have a mountain range scene very similar to this: The mesh is a simple plane extruded to form a low poly mountain range, the animation uses 3 shape keys, a base and 2 for random vertices ...
5
votes
0answers
224 views

File output node and output panel both exporting during animation

I have an animation ready to render but there is a small annoying issue. I currently have a basic file output node to export the raw render and a mist pass and they are both set to export to the ...
5
votes
0answers
259 views

Does anyone have an example of template_curve_mapping?

I'm doing some test with template_curve_mapping. I have write this code: ...
5
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0answers
596 views

Is there a shortcut to undo a viewport move?

Is there a hot key to undo a view port change similar to the bracket key in Maya? I've looked through the hotkeys and don't see anything. Thank you.
5
votes
2answers
2k views

Bake texture from view

I have a wooden crate with textures and all. Its hard to explain. I want to turn this (figure1) into this (figure2) the only way i can think to explain it would be projection baking. Where i project ...
5
votes
0answers
398 views

Animation showing last frame when played?

To make this simple I have a .blend that you can look at. I have simple logic: 1) When the prop "Active" is true, our object is visible. When false, invisible. 2) When Spacebar is hit, "Active" ...
5
votes
0answers
361 views

Wrapped packaging model?

I want to make a plastic wrapped packaging as shown in the photo. its wrapped and folds on sides towards the back and overleaps. where should i start? I tried playing around with vertices in edit ...
5
votes
0answers
900 views

Setting bouncing curve in graph editor

Is it possible to modify the bouncing and elatic curves in the graph editor ? For example, modifying the number of bounces, the amplitude, ... ?
5
votes
0answers
465 views

How to display texture preview on a custom node?

I'm trying to use layout.template_preview to display texture previews on some custom nodes I created. I'm currently calling it with just: ...
5
votes
0answers
516 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 ...
5
votes
0answers
821 views

help with exporting game as .exe

I've been working on a game with levels. I know how to use scenes and transferring to scenes for the levels but it's getting laggy and slow. I know I can just do 'Start Game From File'. That will ...
5
votes
0answers
709 views

Converting an obj sequence to a .bobj fluid sim cache?

I'm wondering if there is any way to accomplish turning an obj sequence exported from realflow into a .bobj fluid cache that I could then trick blender into loading as a native fluid sim cache. So far ...
5
votes
3answers
2k views

How to properly create hollow text letter suitable for 3D print?

I am doing this project, where the objective is to print some hollow letters. I get to the following result with the spets that I took, where the objective is to make the letter 5 mm thick, with walls ...
5
votes
1answer
432 views

Force Cycles GPU rendering for a Render Farm

So basically I'm on vacation for 2 weeks with a laptop without a CUDA device. I do have access to a render farm with GPU rendering support. Now the problem is that I can't setup blender to render in ...
5
votes
1answer
726 views

Is there a way to make baking sound to F-curves more accurate?

At the moment I've got a script that generates a bunch of bars, and bakes a narrow range of frequencies to each bar's Z scale. It ends up being a pretty simple spectrogram that I composite onto the ...
5
votes
1answer
1k views

ANT Landscape erode option?

I have just updated to Blender 2.79 and was playing around with the updated ANT landscape add-on when I noticed a new option called Landscape Eroder, this has the potential to be really cool but I can'...
5
votes
2answers
1k views

How to use dual scroll wheel mouse in Blender?

I've seen some mice with an extra scroll wheel like the Logitech MX Revolution. Is it possible to use this in Blender? If so, what is a good use for it? I currently have a MX518 mouse, which has ...
4
votes
0answers
35 views

Recover python script after blender crash

When writing a script and Blender crashes I lose the changes in my script? If blender crashes, I can only get the scripts I've saved manually saved (via Alt+S or Edit > Save). Often I will do Run ...
4
votes
0answers
34 views

Python Autocompletion

Is there any option for Python autocomplete to work properly in Blender? Currently it shows under Tab all the possible options that were entered previously in the code. It doesn't make any sense to ...
4
votes
0answers
48 views

Blender won't start - GPUShader: compile error - AWS Elastic Graphics

I am looking to run a Blender workload in Amazon Web Services (AWS). I am testing on a Windows Server image on a non-GPU compute resource. Instead of GPU I am attaching AWS Elastic Graphics to the ...
4
votes
0answers
77 views

Mantaflow simulations causing strange diamond artefacts

I've create a fluid simulation with mantaflow and am rendering the FLIP particles themselves (no mesh). The simulation looks great (with a resolution of 96) but when it becomes quite turbulent there ...
4
votes
0answers
55 views

Blender python interpreter doesn't like cuda: Trying to run cupy

I'm trying to launch some form of cuda interaction via the blender python interpreter and keep running into Segmentation Faults. After tracing through the code with python's ...
4
votes
1answer
116 views

Rigging delta arms

I am currently trying my hand at rigging a virtual delta 3D printer in Blender. In it, the position of the central sphere (the printer's "nozzle") should be determined by the z-position of the three ...
4
votes
0answers
51 views

Shading according to velocity

I have a rigid body simulation of many objects and would like to change how they're shaded depending on velocity. It's easy to get location from object info node, but how about change in location ...
4
votes
0answers
95 views

Is there literally NO way to start a particle animation when the particle is emitted?

I've been battling the particle system for over a week now without any success. A little context to what my issue is: I'm using an instantiated collection(!) with 4 meshes in it as particles, each of ...
4
votes
0answers
142 views

Is there a low level alternative for bpy.ops.mesh.separate()?

I am dealing with a great model, I have a problem, I want to divide it by parts, but bpy.ops.mesh.separate(type = 'LOOSE') seems to have a big problem, that is not ...
4
votes
0answers
133 views

Blender 2.81 Eevee lights clipping through objects when using volume shader

I want to use Eevee to render my animation in Blender 2.81. The animation involves lights behind/inside objects with one side open. When I add a cube to the scene with a Principled Volume shader in ...
4
votes
0answers
131 views

Lighting/glare issues with Eevee

I have a lighting problem with Eevee, this is the rendering without baking indirect lights and reflections: nothing strange here. But if I bake lights it render like this: as you can see there is ...
4
votes
1answer
76 views

Boolean Modifier Trouble - Yes… The Anvil

I am following a tutorial by the Blender Guru on how to make an anvil and everything was going well until I came to use the Boolean tool. When I use it - I do see a cut out in the mesh, however when I ...
4
votes
0answers
288 views

Eevee Linear / Cubic Texture Interpolation Complex Node Issue / Bug

A friend has been working on a project, and they have run into issues with using Linear Interpolation & Cubic Interpolation with their complex node tree. This node tree will be working with low ...

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