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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443 views

Creating nodes with dynamic number of input sockets?

Is it possible in any way to create one's own node type in one of the node editors (let's just say the Compositor for example) that can have a dynamic number of inputs? Not a group node, just a ...
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368 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 ...
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1answer
156 views

Help figure out where this phantom rust is coming from

I have an object with two non intersecting UV Maps. One UV Map (round.red.light.decal) is to place a red light decal (round.red.light.png). The other UV Map (rust.map) was used to draw an image mask ...
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487 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 ...
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0answers
197 views

Scripting an "open image" button input for image/env. textures?

Is there a way to script out a normal image/environment texture node with the exception of an "open image" button input that can be plugged into a node group and have that button actually be displayed ...
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765 views

How to create topographical contour lines ?

I am working on engraved cave walls, got from 3D scan. I would like to create topographical contour lines (maybe not "lines" but "ranges" ...) in order to see better the engravings. I have already ...
3
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0answers
70 views

Defcous Node algorithm

I am working with Blender to generate defocus images using the Defocus filter it provides in the Node Editor. The official doc says that the blurring is done as a "post-process" using the Z values in ...
3
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0answers
634 views

Using data with python nodes

I have created a number of python nodes inside my own tree. I have one node that takes one input and has a button called "Simulate". This is an operator that is held in another file. Currently all it ...
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0answers
127 views

How can I use a mask in World Textures

I have a cycles world setup with 2 textures rendering out as equilateral (for 360 deg video). I would like to use either a mask shape or an object from the filed of view as a mask between the 2 ...
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0answers
216 views

Time remapping incompatible with particle info node?

I'm trying to make a spark material that fades to transparent as it reaches its lifetime limit. I've succeeded, but it absolutely does not work with time remapping for some reason. Here is my problem ...
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220 views

The problem of distortion on the composite

Hi all, I have a problem. I will render an object, is simply a box, get the rendering, compositing, then distort it. As a result of rendering over a live video the cube is smaller and renders with a ...
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0answers
366 views

viewing node outputs

If you have a node, it's pretty easy to get it's output in a visual form. With colors, normals, and values between 1 and 0, an Emission shader can be used with a Material-mode viewport... ...but when ...
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77 views

How to create an image whose alpha value changes according to a curve through time in node-editor?

I connected an image-node with a composite-node and connected a value-node into the alpha of the composite-node. I changed the values and the image changed its transparency. Then, I connected the ...
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0answers
5k views

How to make procedural wood material with knots?

Recently I saw new cycles wood shader from CG Cookie, that looks very impressive and I was wondering if it is possible somehow to mix few wave textures to achieve natural looking knots on the wood. ...
3
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0answers
2k views

Transparent Plane Still Casts Shadow

In cycles render I have a RGBA movie of a man waving that I'm using as a texture on a plane. Using nodes, I can make the alpha channel transparent, but the plane is still casting its rectangular ...
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0answers
589 views

OSL: Giving the texture method a color instead of string

Is there a way to give the OSL method texture(string, float, float, ...) a color input instead of the string which reads an image file? Or is there any type of ...
3
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1answer
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 ...
2
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1answer
13 views

What's the math behind Vector Rotate node?

I’ve been taught that the Axis input is the value for input vector n^ of the Rodrigues’ rotation formula: v’ = (1-cos(θ))[(v·n^)n^]+cos(θ)v+sin(θ)n^×v But I don’t understand what ‘’Center’’ input do. ...
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0answers
33 views

Geometry Nodes: Is it possible to merge multiple curve segments?

I am using Geometry Nodes in Blender 3.0 to generate a bunch of curves and I would like to join them together - ideally converting them to a single curve object. The Join Geometry node allows me to ...
2
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0answers
29 views

Applying Specular Highlights Separately? (Eevee Nodes)

For a bit of context for what I'm stuck on: I'm working on an original anime/toon shader for skin. It takes the base texture colour and applies a colorramp-ed shadow from a principled bsdf shader with ...
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0answers
40 views

How to access triangle vertices and their attributes in shader nodes

Is there a way to access the attributes of a triangle or face associated with the currently processed fragment? I see that we can get barycentric coordinates for each face using Geometry node -> ...
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0answers
26 views

Is it possible to rearrange the order of node inputs based on a driver?

I have the following node group with a handful of surface inputs. The object with this material has a custom property that I'd like to keyframe and use as the value of a driver that changes which ...
2
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0answers
45 views

Hierarchical Voronoi?

I'd like to vary the size of Voronoi cells (from the Voronoi Texture node) depending on a vertex attribute. The final goal is to have larger and smaller scales on a procedural creature's skin, ...
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0answers
22 views

Is there a way of controlling the position and colour of a stop on a color ramp node?

Conceptually I want what's in the picture. Rather than having the position / colour of the stop only being set in the node UI, can I plug another node in to control it?
2
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0answers
32 views

Call a function that prints the name of the node that the user is changing a parameter on?

What’s the most performant way to call a function every time a user changes a parameter on a compositor node (even if the node isn't selected), and get the name of that node in the function which is ...
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0answers
38 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 ...
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0answers
34 views

Create Object coordinates from Object's Loc/Rot/Scale?

When you use a Texture Coordinate node's Object coordinates with an empty object selected in the dropdown, the transforms of the empty effect the texture its plugged into. You get the Object's Loc/Rot/...
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0answers
20 views

Is there a template or something similar to draw any node in the ui panel?

I state that I am able to draw a UI panel with default_value etc. input nodes But seeing that there is a widget called template_color_ramp I can draw my node in ...
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0answers
21 views

How to restore node combinations?

I have this spiral with 5 slots. Now I'm going to try color combinations for each slot e.g. black as color for slot ground and any other for topLeft. I then render, save the png image and make other ...
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0answers
40 views

Moving the generated coordinates with the object

I used the generated coordinates to texture a text that I'm rotating, and I want the generated coordinates to rotate in the opposite direction so as to counteract the text's rotation. To make an ...
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0answers
30 views

how do I make a tiled UV island without this white line?(node Fraction)

I started learning how to create shaders. I saw an interesting technique on the network, but I did not understand how to remove this white line and why it appears in it. I would be very grateful for a ...
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0answers
40 views

Is there a node-based implementation for saturation that works a little more like Photoshop?

I am asking this question because I am putting together a node group to adjust some basic color and contrast settings for texture maps. I really hate the way that Blender's Hue/Saturation node ...
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0answers
30 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 ...
2
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0answers
44 views

More than four color mixes results in mesh turning pink (Eevee)

I have a group of texture colors and color mixes that mix them together into one shader. There is a value counter that changes which texture shows on the mesh (If value=0, then switches to texture#0. ...
2
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0answers
13 views

Mapping Driver not applying changes

I am following CGMatters Tutorial on procedural crystals but the added drivers to the mapping node are not making any changes when scaling the object in question. I'll add in an image, if anyone has ...
2
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0answers
31 views

Camera vector to Tangent

Pretty new to Blender, coming from Unreal and I'm trying to convert a Camera Vector to a Tangent Vector. Vector Transform Node (similar is also found in Unreal) doesn't seem to convert to Tangent. Any ...
2
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0answers
61 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....
2
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0answers
55 views

Problem using noise node, pixelated noise texture in output

I was watching a tutorial on using the noise node and wanted to follow it to create this: But I followed the tutorial and got this pixelated texture instead: How do I fix this?
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0answers
198 views

Blurry nebulae in Eevee

I'm trying to render a scene in which I have nebulaes made from volumetrics. EDIT : I forgot to mention that it is a "flythrough" scene, the camera is flying through 4 successive volumetrics ...
2
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0answers
64 views

Why Pointerproperty bpy.types.NodeSocket() work?

I was trying a pointerpropery tied to the node socket, and I'm noticing that it seems to work, but this is weird, as Blender should only support bpy.types.ID, but ...
2
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0answers
38 views

How to make an object not receive light from world?

I have a project of a character laying on a plane and the world is full of stars. Problem is the colors of the world are reflecting on the character whereas i want him to be free from all reflections. ...
2
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0answers
100 views

How to create a blur (fall-off) in a material using node?

I am trying to make a procedural displacement texture using a gradual fall off.Lets say we have created the following texture: L Now I want to give a fall off(or blur the texture) to the give texture ...
2
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0answers
31 views

When rotating video 90 degrees is there a difference between using the Rotate vs. Transform node?

I'm converting some iPhone portrait oriented videos to Image Sequences using Blender. I noticed Blender doesn't load my iPhone portrait videos correctly. They are displayed at a 90 degree angle. So I'...
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0answers
50 views

Get value from a custom node, or a connected custom node

I would like to design my first blender addon and am therefore a beginner in creation of python addons. I would like to create my own custom blender node tree. There is a template (in the text editor) ...
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0answers
47 views

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.
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0answers
21 views

Is it possible to theme the node editor panel to be transparent?

I've been in the node editor a lot recently and noticed that I often want to use the N panel for naming nodes etc. but it takes up a lot of screen space. The N panel in the Viewport is transparent ...
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0answers
419 views

How to pan around the shader editor on a mac?

I just opened Blender and I opened the shader editor for the first time. I wanted to read the properties of the node which is there, but I can not since it falls outside the view. I hold my middle ...
2
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0answers
392 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 ...
2
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1answer
957 views

Roughness in cycles render. Need help with nodes

I am new in a blender, So I have a problem. I created photo scanned texture with normal and bump map (8K res)in photoshop. When I applied it on the object, all looks good in material preview mode, but ...
2
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0answers
66 views

Black spot in middle of Sun Disk when using Sky Texture, v2.90.0

Unsure if this is a bug or if I am doing something incorrect. I have a World set up with a Background Sky Texture, with the following settings: When rendering out the environment, no matter the ...

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