# All Questions

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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 ...
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: ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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?
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 ...
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 ...
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 ...
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 ...
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 ...
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,...
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: ...
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 ...
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?
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 ...
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.
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 ...
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 ...
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: ...
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.
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 ...
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" ...
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 ...
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, ... ?
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: ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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'...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
51 views

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 ...
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 ...
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 ...
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 ...
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 ...