Questions tagged [nodes]

Nodes are used in the Node Editor for compositing, post-processing, creating materials and textures. Use this tag for anything node related.

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71
votes
1answer
28k views

What is a BSDF?

The term "BSDF" is common in Cycles shaders such as "Diffuse BSDF" and "Glass BSDF" but is not present in all names ("Emission" and "Mix Shader" are two such examples). What exactly is a BSDF?
48
votes
4answers
14k views

How do I create repeating patterns with cycles' procedural textures

Most people's question in this area is how to reduce repeating patterns, however I want to create them. I'm creating 2d rendered tiles for my game, and I want to create procedural materials for my ...
38
votes
2answers
4k views

How to make a holographic reticle shader in cycles

Does anyone have a lead on how to set up a shader in cycles to mimic the behavior of hologhraphic sights in blender, as shown in this image? I don't want to have to try and figure out exactly how to ...
34
votes
6answers
30k views

How to blur a texture node in cycles material?

For a Cycles material I need to blur a texture. If the texture where a Texture Image node, I can blur the image before adding it but in my case I need to blur a Voronoi Texture and so I can't do it. ...
33
votes
2answers
33k views

Is there really a way to make a true toon shader material in Cycles?

Is there a way to make a true toon shader material in Cycles? Here's, in order of importance, what would be ideal to find in such a shader: Must use Cycles Must be an actual shader Must not rely on ...
31
votes
2answers
15k views

How do I exit a node group?

I selected a bunch of nodes that I wasn't using and that weren't connected and thought that I would see if I could group them. Well, Blender let me group them alright, but now there is a green ...
30
votes
1answer
3k views

How to make a “reflective tape” material in cycles?

How can I make a cycles material that gets very bright when a light is shown on it, yet still has normal colors? I'm talking about the "Retroreflective sheeting" that can be seen on road signs, the ...
29
votes
3answers
9k views

What is the difference between the displace socket and a bump map?

Aside from the fact that you can control the bump mapping per shader with a bump node, are there any differences between these materials? As far as I can tell, they are the same. Is the displacement ...
28
votes
3answers
23k views

How can I make a material only apply to a side of a plane?

How could a one-sided material be achieved with the Cycles renderer? I would like to create a plane that is completely transparent from one side, and a mirror from the other side. It would be cool ...
27
votes
3answers
8k views

What is Dot Product?

I am doing this Blenderguru tutorial on Making Fire and at some point he is adding the Vector Math node Dot Product to his material. And he says that he does not understand what he is doing but this ...
27
votes
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 ...
25
votes
4answers
12k 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:
25
votes
1answer
17k 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 ...
25
votes
1answer
2k 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 ...
25
votes
1answer
4k views

Possible to control a Driver from a Group Node input slider?

Sometimes I create Material Groups to be used as appendable reusable assets. Unfortunately sometimes parameters I want to control using a Group Node's slider are not available for routing to a Group ...
25
votes
2answers
1k views

How to understand the math behind Andrew Price's embedding his beer within his glass

I just watched the Blender Guru video How to Make a Beer in Blender and stopped at the point where it advises us to make the liquid slightly larger in diameter than the inner diameter of the glass - ...
24
votes
2answers
11k views

Difference between Add Shader and Mix Shader?

What's the difference between Add Shader and Mix Shader nodes with the Cycles rendering engine? I know that Mix Shader gives you more control over the material ratio, of course, but are there any ...
23
votes
3answers
5k views

What do glossy distribution models do?

In Cycles, the glossy (and anisotropic) shaders have a Distribution option. Since I don't really know the difference, I have always left it at it's default (GGX). So what is a distribution model, ...
22
votes
2answers
33k views

Shader nodes are missing?

I have blender 2.69 and I've been following a tutorial on how to make text. The only problem is when I go to add a glossy shader in the node editor it does not exist. Neither does the shader category....
22
votes
3answers
7k 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, ...
22
votes
2answers
7k views

Shadowless render pass

I would like to have full control of the shadows in post production. That's why I would like to have A shadow render pass containing only the shadows of my scene A shadowless render pass containing ...
22
votes
1answer
7k views

Node for setting render colour, regardless of lighting

I'm trying to make a material node setup to set final render colors, regardless of lighting conditions. Is such a setup possible?
21
votes
6answers
6k views

Voronoi Cracks Fac?

I am familliar with Blenders Cycle's Voronoi Texture and have fiddled with it for a while. I am trying to get a result that is not like Intensity or Cells, but more like cracks. I tried the node setup ...
21
votes
1answer
32k views

How can I make a more realistic glass shader? [duplicate]

Here's a sample scene: A room with a window, a point light to project light into the room, an HDR environment outside the room and a nice Image by Rembrandt that should be somewhat reflected on the ...
20
votes
2answers
20k views

How do I colour a 3D terrain based on its height?

How do I colour a 3D terrain based on the height? Say, bottom green, and gradually to brown in the middle and white at the top. When I use colour ramp node, I can see gradient colour across the 3d ...
20
votes
2answers
3k views

How to pixelate a texture in Cycles?

I've been creating various camouflage patterns using Cycles material nodes. Now I want to create a digital camouflage pattern like the one below. My first thought was to pixelate a noise pattern. I'...
20
votes
2answers
8k views

Post-processing Lightsabers in Blender

I've been studying JamesVillanueva's lightsabers for a while now, and have tried to recreate the effects in Blender. The trouble I'm having is with the blade in the compositor. Keep in mind that I'm ...
20
votes
1answer
5k views

How to render a mesh transparent with a color on its edges only, with nodes?

I would like to have my object transparent, with a color only on the edges, would someone know how to do this? I am starting with the nodes, if anyone can help with some guidelines I would really ...
20
votes
3answers
12k views

Way of seeing data as image anywhere in a Cycles nodes setup?

I made a complicated nodes setup for a material using Cycles. Is there an easy simple way to peek at the data passing through any node, to view it as an image? I desire something like an ...
20
votes
3answers
912 views

Which is faster: A math node tree or an OSL shader?

In terms of render times for Cycles materials, which is faster? A material node tree containing many (~20-50) math nodes or a single OSL shader script node performing the same calculation.
19
votes
3answers
11k views

How can I convert a node made material into an image texture?

I have a sphere having a planet material MADE WITH NODES, and I want to convert this material into an image texture; because this material is made with nodes and only works in Blender, but I want to ...
19
votes
4answers
4k views

Randomly populating procedural shape (or Image Texture) in Cycles

TL;DR How to take a shape or Image Texture and multiply it with random Location, Rotation and Scale along object: Background I have created my first procedural shape on my own from this function: $(...
19
votes
3answers
783 views

What's the point of mixing the same shader types?

Many time I've seen some material using mixing of two same nodes like this: Is there any difference from using this?
19
votes
3answers
4k views

Low Poly Water Effect

How would I achieve this low poly water effect using cycles? But the closest I've gotten would be this:
18
votes
2answers
25k views

Using a Normal map together with a Bump map

I've been stressing these days searching for a video on using a Normal map with a Bump map, but I haven't found something good. Some suggest connecting the Bump input into the Displacement output and ...
18
votes
1answer
27k views

How can I blend two textures together using Cycles?

I am trying to put dirty material over a concrete material in cycles. Now I am trying to do this using a color ramp and a mix shader, but I don't know if this is the only way or best way to do this. ...
18
votes
2answers
10k views

How can I resize/move the “canvas” of an image in the compositor?

As you can see, if I try to translate an image in the compositor, it does not affect the actual bounds of the image, only the pixels themselves. The same thing happens when trying to scale an image: ...
17
votes
1answer
800 views

Is there a way to use logic operators in Blender Shader nodes?

I'm self-answering this question since I've found the nodes useful and would like to share this with the community since I couldn't really find anything related on it here. Are there shader nodes / ...
17
votes
1answer
3k views

What is the meaning of the color of the node sockets in the node editor?

I have been searching on the web and I can't find this. What is the meaning of the color of the node sockets in the node editor?
16
votes
1answer
62k views

How to add a normal map texture and a diffuse texture on a model in cycles?

When I add a normal map texture in cycles I do this - How to combine the normal map texture with a diffuse|color texture? I don't have much knowledge about the nodes in cycles and I have no idea ...
15
votes
2answers
8k views

how are the math node operations in cycles calculated?

How does the math node do calculations with a specific operation: the usual operations of add,subtract, multiply and divide are quite understandable and are(empirically) very similar to some of the ...
15
votes
4answers
5k views

Is there a way to make comments in the node editor?

I'd like to have a node like the Frame node but one that can have lots of text, not just a header. I've looked and it looks like there isn't any such capability so far, so I was wondering how easy it ...
15
votes
2answers
6k views

How to make a 'rocky' material with procedural bump?

If I have a modeled rock and I want to somehow to add details to it like the ones from an Asteroid (like, little holes) which kind of Node setup should I need? My actual node setup (it's on cycles) ...
15
votes
1answer
2k views

Relation between Fresnel IOR and Layerweight blend?

I know that the Fresnel and Layer Weight nodes do much the same thing, but with one accepting a proper Index of Refraction, and the other a value between 0 and 1. I have always used the Fresnel node ...
15
votes
2answers
12k views

Using Texture Nodes for the Displace Modifier

I'm trying to make some procedural textures that will give me a result like this: - this one is said to have been a voronoi + a clouds texture and I figured the best way to combine those is to use ...
14
votes
4answers
36k views

Accidentally hit “toggle full screen”, How do I exit?

I'm stuck in full screen in the node editor. Escape isn't working, and I have no menus and no idea how to leave except to quit Blender and reopen the program.
14
votes
1answer
4k views

Using an RGB map to assign various shaders in a material

I am importing a RGB image into Blender and I would like to replace the colors of the image by materials (Glossy, Glass, or other complex Node setups). For example I would replace the green with an ...
14
votes
1answer
7k views

How to split node connections?

In a tutorial a guy split a line like this: I have try left click and right click but nothing works.