Questions tagged [node-editor]

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

982 questions with no upvoted or accepted answers
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7
votes
1answer
118 views

Is it possible to pass a [color ramp] to a node group?

Are there any addons or other features in Blender that allow the Blender user to write nodes that passes in color ramps and reuse them in a group node? If the answer is yes, then what are the steps? ...
6
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1answer
2k views

How to update compositing nodes via script?

I create some nodes in compositing via python script: ...
5
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0answers
64 views

Creating a painterly effect using Geo Nodes

In short, I want to give a painterly look to my objects. A pretty big issue I've been hit with so far is how to assign the instanced objects to essentially show the material of the object they're on ...
5
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0answers
464 views

Get image pixels from multiple viewer nodes

For Blender 2.81 and Cycles render. I want to access all of the following data passes from a Python script: Z Normal ...
5
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0answers
401 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
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0answers
2k views

nVidia skin shader with the Principled BSDF

I've been using a skin shader primarily based on the Brecht skin shader, which is itself based on the Sum-of-Gaussians approach as seen in 14.4.7 from GPU Gems by nVidia. Its Cycles adaptation, which ...
4
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0answers
87 views

Custom nodes, node limits, and compile times

I am working with some very complex custom toon shaders in Eevee. This causes several problems. First, the compile times are atrocious. Second, I am in danger of hitting the node limit if I also use ...
4
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0answers
57 views

"separate hsv"-node is giving a wrong output

I have a color with a value of 1 and a saturation of 0.3. But if i connect them to a Separate HSV node, the output for the Saturation is 0.54, and it changes if i change the value. Can someone explain ...
4
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0answers
113 views

Creating CMYK Printing Simulator/Shader

Out of curiosity, I wanted to see if I could develop a quick little CMYK print shader in cycles. So that I could plug different images in to the shader and have it display as if it had been physically ...
4
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0answers
163 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
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0answers
400 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 ...
4
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0answers
157 views

Is there a way to get a node's dimensions without displaying it in the Node Editor?

The aim of the question is to calculate a node tree layout for a generated node tree. Nodes have height, width and ...
4
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1answer
1k views

Separate alpha from color in Shader Editor

In the Shader Editor, I can create an RGB node and in there, I can set an alpha value as displayed in this screenshot: However, no color separation node in blender supports extracting that value and ...
4
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0answers
36 views

Gradient texture loses effects in linked smoke simulation group

I have created a smoke simulation with the following node-setup as the material. The three nodes on the far left allow the lump in the center of the smoke simulation to lose their density. The ...
4
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0answers
110 views

How do I curve procedurally generated textures (Clouds)?

I'm quite new to blender and am still getting the hang of things. Having followed BlenderMaster's tutorial on creating clouds, I've managed to create something like this: I already know how to move ...
4
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0answers
195 views

Is is possible to get boids data to animation nodes signalling when they are 'attacking'?

I am creating a space dogfighting scene and I have been able to hook up the particle boids to animation node instances, including positions and even the rotations by normalizing the velocity and ...
4
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0answers
189 views

Compositor File Output Node overwrite?

In the Output tab of Render settings, you can set the output options for rendered animation. One of the options is to have new renders overwrite the previous ones or not. The File Output node in the ...
4
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0answers
269 views

Rendering to Viewer Node in headless mode

I'm running Blender 2.79: /path/to/blender -b empty.blend -P script.py With script.py: ...
4
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0answers
184 views

How to control materials falloff type from perpendicular/parallel to fresnel using nodes?

I used to create falloff maps in 3dsmax quickly and easy. Now I would like to be able to do the same thing in blender. Currently I am using Toggle diffuse ramp operation in blender, but it only ...
4
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0answers
500 views

black displacement artifacts using micro-displacement and adaptive subdivision

I am currently using micro-displacement along side with adaptive subdivision. However I have stumble upon a weird artifact. As you can see there are some black pixelated artifacts along side the ...
4
votes
1answer
656 views

Copy node tree from one material to another in cycles using python

I have two cycles materials (say source and target). I want to copy the Shader Nodetree from the source material to the target material after clearing any currently present node tree(s) in the target ...
4
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0answers
118 views

Is there a way to get the vector to the closest UV seam?

I am looking for a way to get the distance to the closest UV map seam in UV-space as a vector in the node editor. Like this: The blue dot is the current point of reference, i.e. the point where the ...
4
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0answers
663 views

nodes in blender game engine

I have an issue while tring to set up a material for blender game engine. You can see the setup on the image, and the BGE doesn't render my purple object that's on the View panel.
4
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0answers
551 views

Use value of node output for driver

Situation: I have an Object that rotates (keyframed). I use Nodes and Drivers to set the objects color to blue within the first quarter of one whole rotation (90°) and red for the rest (270°). That is ...
4
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0answers
687 views

How can I use a node-based texture for smoke flow in Cycles?

Preface: I'm thinking that this might be a bug, because the behavior's pretty weird. I'm posting it here in case it is the intended behavior and there's some trick I should use. I can successfully ...
3
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0answers
51 views

Creating a Penrose tiling procedural material

I'm trying to create a procedural texture of a Penrose tiling using the node editor but I don't even know where to start with this one. This what a Penrose tiling looks like. It's an aperiodic tiling ...
3
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0answers
28 views

Volumetric Project Image from Center

I've got a volume being generated from an image texture, I just need it to come from the center instead up straight up and down. Here's what I have so far. I tried using UV for the texture coords, but ...
3
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0answers
32 views

Procedural tile texture with different column width and tile lengths

I'm quite new to textures in Blender and still trying to understand how to create procedural textures using nodes. I'd like to create an approximation of these tiles. There are three column widths, a ...
3
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0answers
39 views

Can I make a node group driver independent of materials?

I made a node group that contains a color ramp, and in order to control the color ramp from the outside I read that I have to use drivers. I have never used drivers before and feel lost right now. So ...
3
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0answers
42 views

Can't figure out what nodes to use to make this procedural texture

I'll try to explain the best I can I'm trying to build a texture, using an image as reference: I tried using this 3 combinations: This was my final shot. From Sam Bowman - https://www.youtube.com/...
3
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0answers
88 views

Recreating colored glass shader from VRay/Max to Blender/Cycles

Edit: Blend file: I am converting a somewhat simple scene from 3DSMax/VRay to Blender/Cycles. I'm almost done with the conversion, but I am having trouble with matching the glass shader used in the ...
3
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0answers
111 views

Is it possible to give a custom description to a native Blender property in my UIPanel?

Trying to figure out if some dirty trick to add an input description of unconnected sockets in the UI panel. I can access both the socket input properties, but obviously these have the description &...
3
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0answers
86 views

How to stabilize Random Per Island for Meta Objects

I have a very basic AN setup where I vector jiggle the position of meta ball instances for a lava-lamp-like motion. I wanted to change the color as soon as an individual Meta Ball disconnects from ...
3
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0answers
26 views

Accessing the Render Engine Type as a String from a Driver Expression

I am trying to make a Render Engine switch for node-trees, that will give control over ignoring or using certain node-chains depending on what render engine is used. This is basically an improvement ...
3
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0answers
25 views

How can I anti aliase the measureit lines for the render result

Ive set up this render template for some profiles and each gets a measureit dimension to render out with the result to save time putting it in afterwards, but I realized it is a bit jagged, how can i ...
3
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0answers
69 views

Node Wrangler Viewer node's Emission Strength defaults to 16.667

Is there a way to change back the Viewer node's Emission Strength to 1 by default? Every time I ctrl+click on a node it creates a viewer node with the strength of 16.667 and I have to turn it down to ...
3
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0answers
68 views

How to change the color of my custom node's label

My extension uses nodes and I would like to be able to change the color of their label. At the bottom of the page is a picture of what I'm talking about
3
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0answers
41 views

What's the difference between a Displacement node and a Vector Displacemet node?

I'm relatively new to Blender, and I've followed some tutorials where they use a displacement node, and some where they use a vector displacement node, and I'm not really sure what the difference is.
3
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0answers
130 views

How can I add an image sequence in the compositor with Python?

How can we use python to add images as a sequence into the compositor. I am trying to add a transparent graph onto every frame of the render I have successfully done this on the blender itself, but my ...
3
votes
0answers
101 views

How can I get shader node values based on object angle?

I'm trying to automatically change a blackbody's value based on a sunlamp's directional angle. When the sunlamp shines horizontal, I would like to have a minimum value represented in the shader ...
3
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0answers
2k views

Everything Nodes?

A few years ago in blender community exploded an information that blender will make some game changing feature, they called Everything Nodes, but to this day, we have nothing more than one short video ...
3
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0answers
71 views

How to properly rotating a material using node which has a normal map?

Rotating normal map via mapping node seems will flip normal map, resulting a weird looking material. But directly rotating uv map in uv editor doesn't cause any issue. So how to properly rotating a ...
3
votes
1answer
76 views

Image Texturing - Using cycle's nodes to scale image texture and randomly rotate them

Is there a way to randomly rotate an image texture randomly and keep its mapping scalable? Im sure this has already been asked but can't seem to find it. If someone can redirect me to the appropriate ...
3
votes
1answer
720 views

How to make node group of an existing material into a new group? (in python)

This is what I would like: I'm looking for an alternative to bpy.ops.node.group_make() Because it seems like a bad approach. I simply want to group a new group ...
3
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0answers
165 views

Using texture data from texture properties as node data in Cycles

either I'm clearly missing something or I misunderstood the concept, but I hit a wall with something that should be pretty easy (provided it is already implemented in Blender). I'm basically creating ...
3
votes
0answers
58 views

texture mapping without texture being mirrored on other side of object

I have a cylinder I want to map a texture to. To specify the location of the texture I use an empty. In the material node editor I then use the object function of the texture coordinate node and ...
3
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0answers
879 views

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

What does Vector mean in nodes input and output in Blender? Please explain in simple words
3
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0answers
6k views

How to see the shader preview?

In shader editor , how can i see the preview of the shader or any nodes without it's being applied to objects ? something like 'viewer' node in compositing editor. Right now if i have lot of 'image ...
3
votes
1answer
105 views

Clip depth field of view in nodes

I am a beginner in Blender. This is what I do to save the depth: I can get the real Z in meter from the camera to the object. But how to simulate the field of view ...
3
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0answers
511 views

How to set default values for sliders (node groups)?

I am working on a pretty involved volume shader for artistic looks. I have created a large node group and because of the way I have things set up small changes in values can change the look ...

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