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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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How to display an image in my custom node

I have a custom node and I want it to be able to display an image. I know that the node has a parameter show_preview and if you enable it, no image appears.
user78950's user avatar
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645 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: ...
Hitokage's user avatar
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6 votes
1 answer
4k 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 ...
narranoid's user avatar
  • 197
6 votes
1 answer
2k views

How to update compositing nodes via script?

I create some nodes in compositing via python script: ...
Korchiy's user avatar
  • 179
6 votes
1 answer
2k views

How to crop image based on Alpha in Compositor?

I wonder if there is any way to crop a image based on alpha data like this: The reason I want to do this is that I want to crop the White area of another image (of the same dimension to the Alpha ...
Leon Cheung's user avatar
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5 votes
0 answers
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Flat shading when using displacement or bump

When using a bump or displacement node and bump only or displacement and bump in the material settings, the shade smooth option seems to not be working. Instead the geometry starts to show, auto ...
Karl's user avatar
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5 votes
1 answer
911 views

get this gradient style in blender

I'm trying to get this gradient style: My best result are with eevee with volumetric and gradient on a metaball, but i cannot figure out how to get the gradient fill the totally of the metaballs like ...
Luigi Sorbilli's user avatar
5 votes
0 answers
699 views

Control image texture source from outside node group

I'm working on turning a cavity node setup I found online into a node group I can append to my blender files. The setup uses several mapping nodes (that I already converted to math nodes so the ...
Vinicius Lambardozzi's user avatar
5 votes
0 answers
410 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: ...
ebsddd's user avatar
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5 votes
0 answers
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 ...
b_breen's user avatar
  • 51
4 votes
0 answers
45 views

Dragging new link to an already linked node input doesn't delete the existing link: it switches it to the next input instead. How to avoid that?

Blender seems to have this default behavior when editing node trees: If I have a node with an input that is already receiving a link, and I drag another link to that input, the existing link isn't ...
UseTheFarce's user avatar
4 votes
0 answers
2k views

Does Geometry Nodes use Memory or CPU when instancing?

When using Geometry Nodes what part of the computer does it use when instancing, i.e., memory, cpu? When I try to instance large areas the computer is unable to process. My computer is 2014 ...
hillsville's user avatar
4 votes
0 answers
194 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 ...
Ascalon's user avatar
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4 votes
0 answers
245 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 ...
bstnhnsl's user avatar
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4 votes
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247 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 ...
thaguyinthechair's user avatar
4 votes
0 answers
341 views

Understanding Blender's Invert Node and Varying Bit Depth Images

So, I am trying to wrap my head around exactly what the invert node is doing in the shader editor. I realize that this sounds like the most simplistic question in the universe, but please bear with me....
fmotion1's user avatar
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4 votes
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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 ...
Geri's user avatar
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4 votes
0 answers
569 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 ...
InTheBeef's user avatar
  • 219
4 votes
0 answers
413 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 ...
lemon's user avatar
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4 votes
0 answers
38 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 ...
Michelle Lehman's user avatar
4 votes
0 answers
252 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 ...
asfnarra's user avatar
4 votes
0 answers
251 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 ...
Tilmah's user avatar
  • 111
4 votes
0 answers
369 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 ...
Ascalon's user avatar
  • 6,647
4 votes
0 answers
869 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 ...
icYou520's user avatar
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4 votes
0 answers
885 views

Simulate light bending due to gravity

I'm trying to demonstrate light bending due to gravity, but my knowledge of Blender isn't up to the job. As a test I have a sphere with the Glassy BSDF shader. The colour is set to white, and I've ...
stib's user avatar
  • 981
4 votes
0 answers
230 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 ...
Bart's user avatar
  • 41
4 votes
0 answers
715 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 ...
Lukas Chen's user avatar
4 votes
0 answers
805 views

How to add a checkbox to a nodegroup

I am making a nodegroup and in it I have an option to invert the texture but it's a slider from 1-0 and you would only even need it to be either 1 or 0 so I was wondering if there was a way of adding ...
Dave307's user avatar
  • 41
4 votes
0 answers
749 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 ...
Varun kumar's user avatar
4 votes
0 answers
131 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 ...
PGmath's user avatar
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4 votes
0 answers
708 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.
Yvain's user avatar
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4 votes
0 answers
1k 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 ...
Järv's user avatar
  • 41
4 votes
0 answers
748 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 ...
wchargin's user avatar
  • 9,472
3 votes
0 answers
131 views

Possible to make a material that shows negative version of whatever's on the other side?

kind of like a glass material, except anything that's shown through it is inverted, color wise. is this possible to do with just nodes in eevee? here's an edit of what I'm trying to go for.
Cloud_In_A_Bottle's user avatar
3 votes
0 answers
68 views

Can you change the Noodle Curving behavior, particularly for left-directed connections, back to how it was in Blender version 3.1?

In versions 3.1 of Blender and earlier, noodles connecting reroute nodes would end neatly right on those nodes, whether your theme's Noodle Curving was set to 0 for straight lines or higher for curved ...
JimbobJeffers's user avatar
3 votes
0 answers
34 views

Why do node setups shift when I select their objects?

Thoughts? I thought it was related to object origin, but snapping origins to world center did nothing. Also I Applied all transformations. Nothing. I'm stumped.
Trey Harper's user avatar
3 votes
0 answers
553 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 ...
Ghost Lag's user avatar
3 votes
0 answers
155 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 ...
Cody Mitchell's user avatar
3 votes
0 answers
179 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 ...
georgehickey's user avatar
3 votes
0 answers
431 views

Blender point lights: random colour by Object ID

For my exterior visualisations I'm trying to develop a lighting system which allows me to randomize the colors of groups of lamps, instead of all lamps individually. The practical application of this ...
TomTr's user avatar
  • 493
3 votes
0 answers
121 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 ...
Daisy's user avatar
  • 87
3 votes
0 answers
95 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/...
Fabio Alex's user avatar
3 votes
0 answers
268 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 ...
fmotion1's user avatar
  • 1,433
3 votes
0 answers
145 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 &...
Noob Cat's user avatar
  • 1,269
3 votes
1 answer
94 views

Using CFD temperature data to generate lighting

I have a VTK file that contains volumetric data on the temperature at different points on a flame. It has been obtained using a CFD simulation, with the file containing different values of temperature ...
Rahul Priyadarshan's user avatar
3 votes
0 answers
71 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 ...
Ben's user avatar
  • 1,821
3 votes
0 answers
48 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 ...
Johann Davel De Beer's user avatar
3 votes
0 answers
98 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.
Dwarkus's user avatar
  • 43
3 votes
0 answers
709 views

How to export blender material as .material file and GLSL on Blender 2.8

I've seen alot of tutorials that explain how to save material and import it via append file but i wanted to export the material node as .material file and if possible, convert it into GLSL shader ...
Yakki's user avatar
  • 31
3 votes
0 answers
280 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 ...
Jishnu P Das's user avatar

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