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Questions tagged [node-editor]

Questions relating to Blenders node editor. The node editor is used for non-destructive texture and material editing; for geometry node editing and for post-processing/compositing.

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9 votes
1 answer
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Generate a random square texture from color input

I have defined a color palette using the ColorRamp node, and I would like to generate a random texture with those colors. What is the best way of doing this? I'm new to blender, so please explain like ...
slowlearner1337's user avatar
9 votes
2 answers
592 views

how to get a mask that only contains the inside of a bowl

I am trying to texture a bowl (procedurally) and I want a part of a texture to only work on the inside walls of the bowl and vise versa I tried using the back facing option in the geometry node but ...
yash raj's user avatar
  • 103
9 votes
2 answers
1k views

how does cycles calculate RGB to BW

There are many ways to calculate RGB to BW. Which of those ways does Cycles use in the RGB to BW node? (I took a quick look at the git repository, but it's not searchable and I couldn't find the node ...
Marty Fouts's user avatar
  • 33.3k
9 votes
1 answer
1k views

Animate alpha in Cycles nodes

I'm making a shader that combines two image textures based on the alpha channel of the texture on top. Now I need a way to adjust and animate what comes from the alpha-output of the texture node and ...
Antti's user avatar
  • 1,767
9 votes
1 answer
25k views

Blender Nodes in Editor doesn't show preview Image [duplicate]

I have a small problem with my blender lately. I want to make some compositing with my compositing nodes but the problem is, blender won't show me the preview Image. I have a Screenshot for you guys. ...
Marten Zander's user avatar
9 votes
2 answers
20k views

How to add a specularity map in cycles?

I've seen some examples like on BlenderGuru.com and some other youtube tutorials. But, what would be considered the proper way to add a specularity map in cycles?
Vladimir's user avatar
  • 4,705
9 votes
3 answers
6k views

Check if a node exists using Python

Is it possible to check to see if a certain node exists on a material from within Python, for example a diffuse node? I am using Cycles Material Nodes, not Blender Internal or Post-Processing.
rioforce's user avatar
  • 2,052
9 votes
1 answer
6k views

I'm lost in the shader editor

Everytime I hold scroll on my mouse to move, it like somehow teleports down and I have to scroll up again. THis time, it was WAY WORSE, as it went too far down and now I can't find my nodes
M4GN3TIC _'s user avatar
9 votes
3 answers
2k views

Light path Transparent/Diffuse Depth

I'm working on a cycles shader that requires thickness information, and by that I mean interaction between the mesh with the shader itself and other objects inside it, in a way that as closer a ...
Arkhangels's user avatar
9 votes
2 answers
524 views

Custom Nodes: How to validate a link?

I'm developing an add-on that uses a custom node tree. I want to be able to set a link between nodes as being valid or not: NodeLink has the property ...
hekete's user avatar
  • 633
9 votes
2 answers
537 views

Performance of mixing colors vs mixing colored shaders

Is there a performance difference between these two setups? I imagine on a material this simple, there's not going to be much of a difference. But on a complex material, it could. If you had a choice ...
Ascalon's user avatar
  • 6,629
9 votes
2 answers
602 views

Compositing Layers Have Halos

I'm having a heck of a time compositing numerous layers using the Alpha Over nodes in the compositor. I have done this many times before without a problem. All the objects on each layer are ending ...
D. Waschow's user avatar
9 votes
1 answer
7k views

Get "Object Color" property in Cycles

I need a way to get the Object Color in Cycles. I was thinking about using the attribute node, but I don't know what to write in the name entry. Is there another way to get the color? Please don't ...
Hikaru Ai's user avatar
  • 237
9 votes
1 answer
344 views

How to get the current step number in volume render

I need to get the current step number while rendering a volume object the step used for sampling the volume : something like in light path node " transparent depth , ray depth "
Chebhou's user avatar
  • 19.6k
9 votes
1 answer
498 views

How can I transfer a collection of float values to a node socket​​?

How can I transfer a collection of float values to a node socket​​? This is what I've tried: Create a list of float values ​​and convert each of them to a string Pass the string to the socket In the ...
Alexander Nedovizin's user avatar
8 votes
6 answers
9k views

Make specific color in a texture transparent

I am working with very old model files that have BMP textures. The designers did not use a transparency in the textures or a separate alpha b/w texture. They used a specific color value that was then ...
russellaugust's user avatar
8 votes
4 answers
1k views

How can I hide texturing seam in torus?

How can I hide this seam on the torus texture?
blender breath's user avatar
8 votes
3 answers
7k views

How to achieve a realistic material for an operative phone screen?

I'm trying to recreate an electronic device where the screen is ON - like this: I can easily achieve the off version, just a glossy sharp black material, but as regards the "on" version, displaying ...
blue's user avatar
  • 1,287
8 votes
3 answers
42k views

can't see material nodes in node editor

My material node is missing in the viewer. No matter how much I mouse around, I can't find it or add shaders to it. If I delete it, and add another material, it's still missing.
Kate Song's user avatar
  • 151
8 votes
4 answers
6k views

Shader: Rounded edge between the two intersecting faces?

Is there way to do "Rounded Edge Width" in Blender? It's familiar for me from Modo. Anyone know the trick? Like Modo's Rounded Edge Width. Couple links for reference: From the modo documentation: ...
Sakari Niittymaa's user avatar
8 votes
3 answers
3k views

Understanding the bump node

I see a lot of tutorials that explain how to use a bump node by demonstrating its use and giving a hand-waving explanation regarding what it actually does. Things like it "perturbs the normal&...
rothloup's user avatar
  • 413
8 votes
2 answers
7k views

How to create procedurally generated surface bubbles on a liquid

I am trying to procedurally generated surface bubbles on coffee. I know that you can use a UV map to do this, but I'd like to have more control. There is a nice demo of doing this with animation is ...
Dana Williams's user avatar
8 votes
3 answers
3k views

Why is the node editor showing different kinds of nodes?

I have been following this tutorial until I started adding nodes. The problem is that he has completely different nodes than I have. Even nodes that are created at start are different (I have Material ...
Wojtek Wencel's user avatar
8 votes
2 answers
2k views

Backfaces give strange results with Fresnel Node in Cycles

I'm trying out a fairly common material setup, mixing a diffuse and a glossy shader with a fresnel node. My issue is that my material has some backfaces owing to its construction. They render ...
BenSimonds's user avatar
8 votes
2 answers
729 views

Decreasing star count

I am creating a completely procedural space with some stars, nebula, etc. The stars are generated by a Voronoi texture hooked up to a Color ramp - a pretty usual approach as far as I know. I would ...
Ondrej's user avatar
  • 287
8 votes
4 answers
4k views

Make Object emit light & be reconizable

i want an object to emit light, but still be recognizable as the object, like in this picture. i tried using Luts in the colour management and tried to make only a second, weaker emitter be visible ...
Mnkymnk's user avatar
  • 944
8 votes
2 answers
2k views

How to shift noise texture without distortion?

I am struggling with understanding how to shift the noise texture connected to another noise texture without distorting the overall shape. I have tried connecting them to same mapping, and to separate ...
Paul Pieless's user avatar
8 votes
2 answers
546 views

Please explain logic of this transparency material nodes

For the texture coordinates, I take the vector of the plate that is under the cube. The length of which of the object vectors is taken? And why if I change the 2nd value in "Less Than", the ...
Ragirhid's user avatar
  • 127
8 votes
1 answer
2k views

How to make a solid shader in blender?

I'm trying to get an accurate RGB 255, 0, 0 color. Render engine: Cycles Here's my attempt, what am I doing wrong? I've tried using different color management ...
cxnt 's user avatar
  • 397
8 votes
2 answers
651 views

how to recreate microscopic diatom glass material

I have been trying to recreate the material seen in the picture without success, this picture is an electron microscope image of diatom shells, they have 2 important characteristics. first, since they ...
Stag beetle's user avatar
8 votes
1 answer
1k views

Make light paths only pass through non-emitted areas?

I'm trying to make it so that the plane is transparent except for the light from the aqua emission. Or in other words, how can I make it so that the plane's white areas are transparent and the plane's ...
Squirrel's user avatar
  • 855
8 votes
3 answers
827 views

Texturing a cube based on direction of normals

So I've been trying to find a way to texture a cube based on the location/direction of face normals so that any extruded geometry is automatically aligned perfectly with the texture. With my limited ...
spyro's user avatar
  • 465
8 votes
1 answer
2k views

Scale Texture with a Value-/Math-Node

in my node setup I have a value node. I want this node to influence the scaling of my mapping node. Is there a way to achieve this? Or is there a math/vector node setup I can use to manipulate the ...
bstnhnsl's user avatar
  • 2,710
8 votes
3 answers
6k views

Can custom nodes be written for the compositor?

Is it possible to create a custom compositor node using python? I'd like to be create the following node: Input sockets for Image and ...
ajwood's user avatar
  • 10.1k
8 votes
2 answers
3k views

Controlling ColorRamp nodes with Group Inputs

Is there a way to control parts of a node (that doesn't have inputs) with Group Input nodes?
HamBob's user avatar
  • 117
8 votes
3 answers
4k views

Volumetric Shading in Cycles

I understand that there is no proper way of doing volumetric shading in cycles yet, but I'm curious to know if there is a way to fake it. Effects such as clouds or fire.
Mellow Almas's user avatar
8 votes
1 answer
6k views

Do nodes in EEVEE work the same as in Cycles?

I played a bit with nodes that I have a basic idea how they work but not much more than that, so I have to learn much more about it. I know Blender Render uses different nodes than Cycles. As of now ...
Eric Huelin's user avatar
  • 2,251
8 votes
2 answers
3k views

How to introspectively modify nodes from Python

Ok, this is quite a weird case. TL;DR Why (and how is it Pythonically possible that) Blender's nodes dont have the __dict__ attribute. How to programatically add ...
Mörkö's user avatar
  • 1,296
8 votes
3 answers
2k views

How to start a Time Node?

my goal: This is my first compositing attempt in Blender, my goal is to create an animation shown in the render window, the animation is a simple shift from one colour to another within about 100 ...
Abdul Al Hazred's user avatar
8 votes
3 answers
1k views

Voronoi map in the compositor

I just saw this on codegolf and thought it would be an increadibly cool application of the Blender compositor for NPR. Perhaps coupled with a blur shader this could make a nice painterly effect. Is ...
amziraro's user avatar
  • 480
8 votes
1 answer
886 views

How do volume shaders interact with light?

In this answer I would like to understand What does it mean in Node Editor that light will interact with volume? I would like to see a few pictures showing the difference/meaning.
user105898's user avatar
8 votes
1 answer
15k views

How to Convert Material Displacement to a Mesh?

So I created this complex (for me) node network to create mountains. I didn't sculpt them, it's just a plane subdivided a lot with a subdivision surface mod. So the actual mountain is only visible in ...
AntonPg's user avatar
  • 333
8 votes
2 answers
23k views

Is Backface culling possible in render mode?

Let's say I have an 3D object (semitransparent) which contains another object in it. To make it more visible I used backface culling which really works fine in the solid display. When I try to switch ...
Khang Cao's user avatar
  • 249
8 votes
1 answer
5k views

Using the False Color look in combination with the CDL Node to work on Wide Dynamic Range scenes

The color management for working in cycles can be enhanced to work with wide dynamic range scenes. The idea is to enable working with scenes containing values that exceed the conventional 0-1 range. ...
user avatar
8 votes
1 answer
2k views

What is the Alpha Convert node used for?

What is the Alpha Convert node used for? I've never seen any tutorials on it. Also, if there are several good uses for it, examples would be great!
Thom Blair III's user avatar
8 votes
1 answer
2k views

What does "Vector" mean in nodes as input and output? Please explain

What does Vector mean in nodes input and output in Blender?
ADITYA DAS's user avatar
8 votes
1 answer
3k views

What exactly does the Normal node do?

The Blender manual page doesn't give too much information. It has a sphere to change a direction. What direction does it change exactly? I understand that normals are vectors perpendicular to mesh ...
Zac's user avatar
  • 434
8 votes
1 answer
6k views

How can I disable auto compositing?

I am working in the compositor with a lot of textures and distort nodes, which makes it very slow (easily 20-30 seconds to composite.) Every time I make a change, it re-composites. This is fine when ...
Ascalon's user avatar
  • 6,629
8 votes
1 answer
7k views

What's the Benefit of Using Layer Weight?

I just don't see the difference using Facing and Fresnel, or Layer Weight as a whole in my node editor. Is it a big difference using it, is it useful for distant objects?
BinaryGreen's user avatar
8 votes
2 answers
3k views

Modify light range with nodes

I can make a light not illuminate things further away than a set distance, using the attached node setup. Is there a way to refine this setup so that the light intensity can be controlled between the ...
Booth's user avatar
  • 665

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