Questions tagged [shaders]

A shader is a computer program that is used to do shading, texturing, special effects or post-processing. Shader nodes specifically refer to the nodes used to create shaders for Cycles, but this tag can be used for other shaders as well.

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What is a BSDF?

The term "BSDF" is common in Cycles shaders such as "Diffuse BSDF" and "Glass BSDF" but is not present in all names ("Emission" and "Mix Shader" are two such examples). What exactly is a BSDF?
wchargin's user avatar
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50 votes
6 answers
51k views

How to illuminate the darkness inside glass objects in Cycles?

My model has a clear plastic (or glass) dome with objects inside. The objects appear dark. I've tried the glass shader with color 100% RGB, with very small IOR, and using just a refraction shader. ...
DarenW's user avatar
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47 votes
3 answers
25k views

Iridescence In Cycles?

Is it possible to create an iridescence shader in Cycles? Specifically for something like DVDs, soap bubbles, engine oil, etc..
gandalf3's user avatar
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45 votes
10 answers
44k views

How to reduce fireflies in Cycles?

I often use Cycles' built in Glass BSDF shader to achieve realistic refraction effects, but in many cases, it seems that Cycles' glass caustics creates an unfortunately large number of fireflies (...
Gwen's user avatar
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41 votes
1 answer
13k views

How does EEVEE work?

We all know what Cycles is, at least to a first approximation: Cycles is a path tracing engine [...] Specifically, cycles is a "backwards" path tracer, which means that it traces light rays ...
Nicola Sap's user avatar
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38 votes
15 answers
6k views

What's the most fun way to make a Snowman in Blender? ❄︎❄︎❄︎

Previous challenge: What's the most fun way to create a fork in Blender?? Winter is here, and I'm trying to build a snowman. But my Blender freezes after the first snowball! (is it because of the ice?...
jachym michal's user avatar
38 votes
2 answers
7k views

How to make a holographic reticle shader in cycles

Does anyone have a lead on how to set up a shader in cycles to mimic the behavior of hologhraphic sights in blender, as shown in this image? I don't want to have to try and figure out exactly how to ...
AlbinoPanther's user avatar
35 votes
6 answers
7k views

What's the fastest / most fun way to create a fork in Blender?

Related challenge: What's the fastest and / or craziest way to model an arrow in Blender? I tried to make a fork in Blender, but it was so boring I fell asleep. Is there a faster / more fun way to ...
jachym michal's user avatar
35 votes
4 answers
28k views

How do I create a reflective white material?

I'm pretty new to this and this is my first question here, any help would be greatly appreciated. So basically what I want to achieve is a floor material as seen in this photo... ...the reflections ...
user1163818's user avatar
35 votes
1 answer
7k views

How to make a "reflective tape" material in cycles?

How can I make a cycles material that gets very bright when a light is shown on it, yet still has normal colors? I'm talking about the "Retroreflective sheeting" that can be seen on road signs, the ...
David's user avatar
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31 votes
4 answers
14k views

Blurring/Feathering a Procedural Pointiness Mask

I'm trying to create a procedural mask to affect the sharp edges of my model using the Pointiness output from the Geometry node, ...
Hexbob6's user avatar
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30 votes
1 answer
10k views

How do I emit light from inside a object?

I need to know how to make the buttons in my blender project look the same as in this photo. Mine all look pale, even with the emission material. Is there anyway I can get my buttons like this?
Borat Sagdiyev's user avatar
30 votes
2 answers
16k views

Difference between Add Shader and Mix Shader?

What's the difference between Add Shader and Mix Shader nodes with the Cycles rendering engine? I know that Mix Shader gives you more control over the material ratio, of course, but are there any ...
Gwen's user avatar
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26 votes
3 answers
18k views

How to change hair color along length of strand?

At some point (not right away), I'll be wanting to make a character model which has multicolor hair. Namely, it will be one color closer to the roots, and another color closer to the tips. Is there ...
Zauberin Stardreamer's user avatar
26 votes
3 answers
10k views

What do glossy distribution models do?

In Cycles, the glossy (and anisotropic) shaders have a Distribution option. Since I don't really know the difference, I have always left it at it's default (GGX). So what is a distribution model, ...
PGmath's user avatar
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25 votes
8 answers
113k views

How to render cartoon style with completely flat colors?

How to render perfect cartoons in blender? Whatever the engine is (internal or cycles) I always get that shading transition somewhere on the model. The first picture is in blender internal render ...
Vladimir's user avatar
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25 votes
1 answer
8k views

Is there a way to use logic operators in Blender Shader nodes?

I'm self-answering this question since I've found the nodes useful and would like to share this with the community since I couldn't really find anything related on it here. Are there shader nodes / ...
asoftbird's user avatar
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24 votes
2 answers
20k views

Texture vs. Material vs. Shader

I'm working my way through a Blender online course. Sometimes the word material is used, other times it is a texture or a shader. I feel like all three of these words, while related, have a ...
John F. Miller's user avatar
23 votes
2 answers
44k views

Shader nodes are missing?

I have blender 2.69 and I've been following a tutorial on how to make text. The only problem is when I go to add a glossy shader in the node editor it does not exist. Neither does the shader category....
user2389's user avatar
  • 397
23 votes
2 answers
7k views

Custom fresnel curve

When it comes to recreating the shading of metals like chromium with such extreme reflection curves it's obviously inaccurate using one averaged reflectance curve. Also eye-balling the values appears ...
brockmann's user avatar
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22 votes
1 answer
18k views

What is the difference between Translucency and Transparency?

I have been wondering this for a while. What is exactly the difference between a translucency shader and a transparency shader?
Owen Patterson's user avatar
20 votes
1 answer
45k views

How to add bump to shader?

I have a simple diffuse shader. I would like to add some bump to it. How can I do this in Cycles? Where do I plug in my checkered texture.
Vader's user avatar
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20 votes
2 answers
9k views

What do the settings in the new Principled Shader actually do?

I'm trying to understand how the new Principled Shader in 2.79 works, so I can make a video tutorial on it. I get most of it, but a few things have me confused, and there currently isn't much ...
Andrew Price's user avatar
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19 votes
1 answer
16k views

How to use Subsurface Scattering in Principled BSDF

The Subsurface Scattering in Principled BSDF is a bit confusing: Where can I find some material presets? What is the difference between Scattering Color and Radius?
jachym michal's user avatar
19 votes
2 answers
5k views

Can Cycles do a Gooch Shader?

Now that 2.68 has introduced a toon bdsf, is it possible to recreate the Gooch shader? Insight, links, or a nodes screenshot would be great.
Wray Bowling's user avatar
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18 votes
2 answers
3k views

Stadium Seating Letters

I'm trying to add letters to stadium seating, to make a custom version of the title sequence of Ted Lasso. I modeled a simple version of a seating block, but now I have to add the letters to it, and ...
Puzzles's user avatar
  • 183
17 votes
4 answers
12k views

Can I refer to another object's properties from a Cycles node shader? Drivers? If so, how?

I am trying to develop several shaders that need to take into account the position or orientation of another object in my scene. Seems like a generally useful thing to be able to do. Here's an ...
Chuck's user avatar
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17 votes
3 answers
6k views

reflecting direct light on glossy surface in Cycles

Working in Cycles. Say I have a "disco ball" with a glossy shader. I'm pointing a spot light to it, and I'm trying to have the reflections of that light illuminate the diffuse material on the walls ...
user avatar
17 votes
1 answer
33k views

My glass material isn't transparent in Eevee

When using Eevee, an object with a glass material (in this case: Principled BSDF, trasmission set to 1.0) doesn't seem like it can be looked through: it's completely opaque. See for instance the ...
Nicola Sap's user avatar
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16 votes
4 answers
6k views

How can stipple shading be replicated in Blender?

I have had this idea for a little while, using Blender to simulate traditional stipple shading. I have gotten an OK effect using a mix shader with ambient occlusion as a factor to spread a stipple ...
Stag beetle's user avatar
16 votes
3 answers
23k views

What does the Roughness setting on a diffuse shader do?

What does the Roughness setting value in a Diffuse shader actually do? The wiki says: Surface roughness; 0.0 gives standard Lambertian reflection, higher values activate the Oren-Nayar BSDF. But ...
gandalf3's user avatar
  • 157k
16 votes
5 answers
5k views

What is the technical difference between a diffuse shader and a rough glossy shader?

If I understand correctly, the roughness value on the glossy shader controls the amount of random scattering of rays that reflect of the surface of the object, with ...
gandalf3's user avatar
  • 157k
15 votes
3 answers
2k views

How to create a twisted spiral tunnel?

I need to to create a twisted tunnel. Example: Though the stripes should have volume since the tunnel is the inner side of spiraled marshmallow tubes. Example: I started adding a screw modifier to a ...
jjk's user avatar
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15 votes
3 answers
2k views

What's the most fun way to make a Santa Claus hat? 🎅

I bought a 3D printer, and as my first project I decided to print a hat missing in my Santa Claus costume, however it came out pretty stiff and without any geonodes hair??? So I returned the 3D ...
Markus von Broady's user avatar
15 votes
1 answer
5k views

How to: Exponential Fall Off for Volume Density?

I'm trying to create a photorealistic Earth Atmosphere. Several papers written on the topic of atmospheric scattering state that our atmosphere's density has an exponential fall off, with most of it ...
CPLTarun's user avatar
  • 317
15 votes
1 answer
3k views

Relation between Fresnel IOR and Layerweight blend?

I know that the Fresnel and Layer Weight nodes do much the same thing, but with one accepting a proper Index of Refraction, and the other a value between 0 and 1. I have always used the Fresnel node ...
Ascalon's user avatar
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15 votes
1 answer
4k views

How can the Glass Shader be imitated using only other shaders?

Exactly what does the Glass shader do? I would guess that it combines the effects of Glossy (zero roughness) for reflections, and Refraction for, obviously, light refracting through the object. ...
DarenW's user avatar
  • 3,169
14 votes
2 answers
27k views

Generate Particles with Random colors (continuously or from a set)

I am trying to do rocks and I want them to have a random base color from within the colors that look "rocky". The only method I know of is to duplicate the base objects over and over and give each a ...
Elliot's user avatar
  • 279
14 votes
2 answers
2k views

How can I make a radial checkerboard?

How can I make a radial checkerboard pattern like this in the shader editor?
deltaray's user avatar
  • 964
14 votes
1 answer
15k views

Smooth transition between two materials

I need to make the transition smoother between the 2 different colored objects in my scene, somehow like one of the colors fades into the other one, while still keeping the line between them.
Bullet93's user avatar
  • 155
14 votes
3 answers
91k views

How to import Downloaded Materials/Files?

This is an absolute beginner question, I'm hoping it's not to broad, I will attempt to narrow it down. I have just downloaded a handful of .zip files for several material packages (all for cycle ...
user29877's user avatar
  • 233
14 votes
1 answer
794 views

What are some use cases for the singlar ray output?

Using the singular ray output, it's possible to detect whether or not the object is being viewed through a perfectly sharp reflection or refraction: Besides changing colors of reflections, what are ...
gandalf3's user avatar
  • 157k
13 votes
5 answers
20k views

How to get random color variation on a single mesh?

I am trying to get color variation and to bake it in a single mesh but the Object Info Random only works if i separate the meshes. Is there an alternative way to get the same result with the meshes ...
Danyl Bekhoucha's user avatar
13 votes
2 answers
43k views

DirectX vs. OpenGL normal maps

I'm curious which type of normal map works better? DirectX or OpenGL normal maps? Which one to use for cycles and eevee?
user avatar
13 votes
3 answers
2k views

How can I make a translucent material that looks like this axolotl tail?

How can I achieve a material that looks like this thin, translucent, frosted flesh, like an axolotl tail?
Dan's user avatar
  • 131
13 votes
2 answers
7k views

Control a ColorRamp node from outside a node group

I have a ColorRamp node inside of a node group and I would like to have a group input which controls the "Pos" value of the white colour, but there doesn't seem to be a good way to do it. Since I'm ...
snipers500's user avatar
13 votes
1 answer
9k views

Add scratches to a material in Cycles?

Is there a way to add scratches (like on worn metal) to a shader in Cycles?
TheCycleOfBlend's user avatar
13 votes
1 answer
11k views

Particle Color based on where the particle is emitted?

Is it possible to change a particle's color to the color of the face/texture part it comes out of in cycles? I want it to be the color of the face after shading and all that other stuff
user17982's user avatar
  • 141
13 votes
2 answers
19k views

How can I add Lens Flares/Halos?

Is there an addon, or an easy way to add lens flare effects or light aberrations in Blender? I've been using Blender for a while now, and it's very time consuming to always have to export to another ...
Wilhelm's user avatar
  • 676
13 votes
3 answers
6k views

Can cycles Wireframe Input be coerced into displaying Tris, Quads and Ngons

edit 2 years later: Here is an alternative answer that meets the desired end-result using FreeStyle. Is there a way to make the wireframe input show the geometry as BMesh polygons instead of the raw ...
zeffii's user avatar
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