# All Questions

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52k views

### How can I render an object with an hdr background?

I have an object with an hdr for the background. What do I do in Cycles to render the background with my object? How is this different from an ordinary render in Cycles? The hdr is a big one, 350MB.
4answers
17k views

### How to install Pip for Blender's bundled Python?

Blender comes with Python, and includes a stand-alone Python executable. However pip is not part of the official Python distribution so it needs to be added separately. How do you setup ...
3answers
17k views

### How can I add motion to a rigid body?

I'm trying to create a bowling animation and I want the ball to hit the pins. I already added the Rigid Body physics to the objects but can't get the ball to move. Obviously I could just add ...
2answers
20k views

### How to Construct a Diamond or Other Gemstone Material in Cycles

What would be the material or shaders node set up for a smooth gem in blender cycles engine? I want a result similar to this image:
3answers
8k views

### How can I change the centre of rotation of objects during an animation?

I have developed several puzzles in Blender, and to test them I wanted to animate them. The first problem I encountered was the rotation of an object around a central hub. Between keyframes the ...
1answer
49k views

### Why can't I import a SVG file from Adobe Illustrator or Inkscape?

I've tried multiple times to import a SVG file from illustrator CS5.5 to Blender 2.71 and 2.73. However, I do not see a mesh, curve, or anything pop up in my "Outliner" window. So I know its not so ...
1answer
4k views

### How can I create Light Streaks in Cycles?

I'm trying to make a light paths like there: To achieve this light threads (streaks) I used a particles emmiter with shining icospheres and motion blur shutter like Andrew. I got this result: First ...
2answers
52k views

### How to convert from high poly to low poly

I'm making a game in the unity engine and for my models i'm using blender 2.6. The thing is that i'm pretty new to graphics design (modeling, sculpting, etc) and by following some tutorials i've ...
1answer
121k views

### How to import a .mtl file?

I am new to Blender. I downloaded a .obj file of a plant model. When I unzipped it I found two files (.obj and ...
3answers
12k views

### Is the Blender GUI package available for other programs?

I really love the look of Blender's built-in GUI, and would potentially like to use these tools in some of my other Python applications. As I understand it, Blender created all of these tools from ...
3answers
25k views

### How can I use my Blender models in WebGL

I would like to create WebGL applications and use Blender as a modelling tool. I don't necessarily need to translate game engine functionality to WebGL but I would like to retain as much of the UV ...
1answer
2k views

### Physical iridescence in Cycles?

Having recently seen the Siggraph paper A Practical Extension to Microfacet Theory for the Modeling of Varying Iridescence, I of course said to myself "I have to have this in Blenderrrrr!" and started ...
2answers
21k views

### How to create a custom UI?

I was watching this video on making a custom UI tab using Python, and in the line from bpy.types import Menu, Panel, UIList, I see the names of objects that look ...
5answers
31k views

### Copy Physics To Multiple Objects

Using the cell fracture addon, I created many objects from my mesh. I want to have a rigid body physics on all of them. How would I copy one of the fractured pieces physics to all the pieces? I tired ...
8answers
29k views

### How to Combine two Normal Maps?

I made a high poly model and then baked its textures onto a low poly model. Now I want to give another normal map's details to the model. How can this be done?
2answers
28k views

### How to solidify edges

I have a complex mesh with only vertices and edges that I want to solidify. The problem is I just want to solidify edges (not any faces) to have some kind of fat wireframe model (i.e. just every ...
4answers
13k views

### What is Ambient Occlusion?

What is Ambient Occlusion and what are some of it's uses? I see it is used in creating what might be called "shadow catchers" in the following node tree setup:
1answer
2k views

### Is it possible to simulate an egg?

Is it possible to simulate an egg? Specifically, I was wondering how to handle simulating the yolk. I was thinking fluid simulation, but it seems you can't a specify different viscosity for ...
2answers
34k views

### Is it possible to apply modifiers to multiple objects at once?

You can copy modifiers from one object to other objects with CtrlL> Make links > Modifiers, or the Copy attributes addon. However, is it possible to apply modifiers to many objects at once?
4answers
21k views

### Glow with depth in Blender?

What would be a way to create a glow in Blender. For that purpose I've been always using the compositor. However, that is pixels work, which means it is a 2d work. To make a 3d one, do I have to use ...
1answer
25k views

### How to change Blender's default startup settings?

How can I change Blender from the default cube/lamp/camera default setup? Also, is it possible to change other features, such as the default view direction (Top, Side, etc) or the Editor type (3D View,...
1answer
18k views

### what can you call from the attribute node?

I know you can call density or flame for example from the attribute node. I was wondering what else you can write in the name slot. And maybe a bit of explanation of the attribute node. thanks in ...
1answer
3k views

### How to store particle locations in a list?

my question is how to store the locations of a particle or any changing data in a list so as to use the locations for effects like trails. What I intend to create are particle trails, the following ...
3answers
14k views

### Cycles: Shadeless “Shadow-catcher” Material for Rendering onto Footage

I am superimposing CGI over video footage, and have run into a problem in making materials for objects that act as 'shadow catchers'. Essentially I want a shader that is shadeless—like an emitter—but ...
3answers
22k views

### How do I scale from one side side only?

How do I scale from one side side only? I want to keep the left side of a object in place, but scale it smaller from the right. See this screen shot: I want it to end up like this: But I had to ...
3answers
37k views

### How to get selected edges length?

I have a female model and I want to know her waist width, so I select the edge loop, then use what tool? Is this only possible with python?
3answers
10k 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 ...
2answers
6k views

### What is the difference between Sobol and Correlated Multi-Jitter sampling patterns?

In Cycles we have two options for sampling patterns. The default is Sobol, there is also Correlated Multi-Jitter. The manual has this to say about sampling patterns: Pattern Random sampling ...
3answers
74k views

### Zoom in and out without a mouse wheel

I am using blender on a tablet, for those times when I can't plug a mouse into the tablet, I would like to still be able to zoom in and out on the viewport. What ways are there to zoom in and out ...
4answers
3k views

### When is it useful to mirror?

Having discovered the mirror modifier I have been assuming I should always use it when modeling a symmetrical object. For instance, take a simple stool. Is it more efficient to model one half with a ...
3answers
22k views

### Select every other face loop

How can I select every other edge loop. In this example its not too bad to do it manually but it other cases it might be. How can I easily select alternating face loops?
3answers
21k views

### Can Blender export to the COLLADA format?

Can Blender export to the COLLADA format? I tried going to File → Export, but COLLADA was not an option. I'm using Blender 2.66.1 on Ubuntu 13.04.
3answers
65k views

### How to deselect using box select?

How do I deselect using the box select tool? I have read about middle mouse button and some other shortcuts but they don't work for me.
2answers
6k views

### Is there a way to unfold a mesh?

Is there a way to take a mesh, cut it with seams or sharp edges and flatten it, so that the faces stay the same shape and size? Making paper models is one aspect, where you could use that technique. ...
2answers
14k views

### Could someone please explain gimbal lock?

I have read the Wikipedia page on gimbal lock, and am still confused about the entire matter. My understanding is that, using a local coordinate system, if you rotate a model about its X axis then ...
3answers
5k views

### Is it possible to change the emission rate of particles over time?

Is it possible to change the emission rate of particles over time? E.g. Start off with an initial burst of particles, then emit at a steady rate. Here is a (poor) example of what I mean by the ...
3answers
13k views

### What are the hotkeys to navigate the timeline?

I am looking for a way to move the timeline a specific amount, scroll, etc. even if the Timeline window is not open. Is this possible?
2answers
34k views

### How can I animate the camera in a perfect circular rotation around a fixed position?

I have an object at a fixed position in 3D space. I would like the camera to circle around it while facing it. I want to path of the camera to be circular in 2D, meaning that it does not move up or ...
2answers
22k views

### How to assign a new material to an object in the scene from Python?

How can I assign a new material to an object in the scene via Python?
1answer
41k views

### Constraint the camera to look at an object

In my scene I have a camera sitting at the origin. I would like to contraint it so that it always looks at the center of a given object. But the camera should not change its position. I found some ...
7answers
123k views

### How to make all faces flip to the right/consistent direction?

What's happening is that I have tried to flip the normals, inside and out, but there are always faces which have to be flipped! Normals recalculated Inside View If I flip them again, all faces get ...
1answer
33k views

### Planet texture generator

What cross-platform (or cross-browser) resources are available to help make texture maps for generating beautiful planetary images using Blender (Cycles)? Ideally, these would include: Terrain maps (...
1answer
6k views

### How to create piles of snow on a mesh?

For example on tree branches like this: Image from Wikimedia commons
7answers
1k views

### Tips and Tricks with using blender with one hand

Long story short, I was recently diagnosed with glioblastoma. I had surgery to remove one of the tumors and because of the surgery, I am paralyzed in my left arm. Hopefully, it's only temporary. I ...
3answers
85k views

### How to save render?

Every time I render an image and try to save it, it just disappears. How do you exactly save a render? I am using a mac.
2answers
44k views

### How do I select vertices that are directly under the other?

I'd like to select vertices that are directly beneath the one I am selecting to save me the trouble from moving out of ortho view. It's mostly on simple shapes like the cube below. Notice how the ...
2answers
67k views

### No file output after rendering?

I usually am able to render successfully to the c:\tmp folder, but when I came into work today, I rendered out the image on my work laptop, and everything seems to ...
6answers
37k views

### How to set a specific edge length numerically?

I've got this question from one of my best students. The question is the following: Suppose, that we have Edit mode with some edges, vertices, etc. How to set a selected edge to have a specific ...
2answers
3k views

### Scientific Illustration: Non-photorealistic rendering of sparse wireframe with dashed/dotted lines for backfacing areas - Blender 2.80

I'm interested in creating a material that gives this end result: I'm studying the possibility to use Blender as a tool for scientific education in pure mathematics. The idea is that the material ...
3answers
8k views

### Blurring/Feathering a Procedural Pointiness Mask

I'm trying to create a procedural mask to affect the sharp edges of my model using the Pointiness output from the Geometry node, ...

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