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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166 views

ignore self-shadows for a cel shaded effect?

So For this project i'm trying to achieve somewhat of a cel-shaded look. Cel Shading is an attempt to make 3D Art look 2D, But The Main problem I've found with Cel Shading effects is the shadows are &...
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87 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? ...
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1answer
1k views

How to update compositing nodes via script?

I create some nodes in compositing via python script: ...
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0answers
406 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
371 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: ...
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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 ...
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78 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
42 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 ...
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60 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
87 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 ...
4
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0answers
138 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 ...
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370 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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131 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
945 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
312 views

Irregular shapes texture

Below is the type of texture I wish to generate using Blender's node system. Thus far, I have tried using a mixture of Blender's base textures, noise, magic, voronoi etc. I have attempted to combine ...
4
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0answers
34 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
99 views

Node Group separator for parameters

Is there any way to add separators to better organize node group parameters?
4
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0answers
103 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
184 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
166 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 ...
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0answers
172 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
3k views

How to create an all-around night sky in Cycles?

So I created a night sky following this video https://youtu.be/9vbq6HOgA2w It was going pretty well until I noticed that only half of the world actually looks decent. The bottom half/ middle is this ...
4
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0answers
646 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
115 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
657 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.
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0answers
501 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
669 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
23 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
29 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/...
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0answers
55 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
105 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 &...
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0answers
33 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
23 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
53 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
37 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.
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0answers
85 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
68 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
63 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
611 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
127 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
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0answers
53 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
votes
2answers
358 views

How do implement the effect of blur on transparent materials?

I'm trying to create a blur effect when a clear light passes through a transparent material. Here's a quick summary of the picture: And when an object is close to a transparent material, it should be ...
3
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0answers
688 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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1answer
148 views

How can I sharpen the light fall off for a rotating earth animation with 2 materials?

Intermediate level question. I have been following Andrew Price's excellent tutorial on "How to make Earth". I have managed to "create" earth, and render as a static image. I have returned to this ...
3
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0answers
5k 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
97 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
256 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: ...
3
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0answers
466 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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