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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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10 answers
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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
  • 11.6k
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
  • 3,179
9 votes
3 answers
14k views

Why does an object with a glossy shader render in black?

When I apply a glossy shader to the material of my text, the text becomes just black. Why? I have lamp and everything, but the problem persists. The text is red before I add the glossy shader. I'm ...
BigBoe's user avatar
  • 99
47 votes
3 answers
26k 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
  • 158k
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
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
6 votes
2 answers
3k views

How can I render objects with very shiny surfaces?

I am trying to render a kitchen sink / Faucet Here is another reference image of what I want What I have got so far is this Settings for World: I have used an environment map HDRI with 0 ...
Saad Aziz's user avatar
2 votes
1 answer
3k views

Cycles - (Shader) Nodes - inputs outputs - What are the exact data types?

I'm currently "hacking" Cycles to fully understand how it works (right down to the source_code), so I can fully maximize its awesome rendering potential for my own future blender projects. Here's how ...
IndigoWarrior9's user avatar
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
  • 12.9k
8 votes
1 answer
15k views

Objects, shadows and reflections not rendering in EEVEE

I started to work with EEVEE short time ago and I was amazed by the capabilities of this engine. However, I noticed something strange when I was rendering some tests. Some objects/reflections/shadows ...
ermac's user avatar
  • 299
2 votes
1 answer
2k views

Bad Shading on Imported Mesh [duplicate]

I have imported a mesh (AutoCad DXF) and I'm experiencing strange shading behavior. I've done the following to try and address the problem with no luck: Recalculate Normals Remove Doubles Delete ...
Josh Teiken'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
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
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
  • 4,705
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
11 votes
2 answers
2k views

How To Do UV Indexing in hexagonal pattern?

how to do uv indexing like this procedurally? i wanna make some shader that can pixelate image but with hexagonal.
Baybaypras'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
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
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
17 votes
1 answer
34k 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
  • 12.9k
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
4 votes
1 answer
2k views

Images as emitters constantly come out dull. White emission not actually white. What am I doing wrong?

I have been using Blender for a while but keep hitting this problem that I don't understand. First of all, I don't understand why I white emission shader set to pure white is not actually white ...
Jay Dawg's user avatar
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
  • 2,038
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
  • 11.6k
6 votes
1 answer
11k views

Objects behind glass appear too dark

It's so dark that the eyes are invisible. Blend file:
thododo's user avatar
  • 587
108 votes
1 answer
47k views

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
  • 9,462
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
  • 14.8k
13 votes
2 answers
44k 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
2 answers
20k 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
  • 686
12 votes
3 answers
3k views

Is there a smart way to apply a better transition between colours while maintaining one solid colour per face?

I recently started using blender for a project. I have tried using a color ramp with a transition between the 4 colours, but the result is too smooth when applied: Im aiming to achieve this kind of ...
devchimp's user avatar
  • 315
10 votes
1 answer
5k views

How to render lightning in Cycles

How can you render a lightning bolt using Cycles?
Paulius's user avatar
  • 861
8 votes
6 answers
9k views

Make specific color in a texture transparent

I am working with very old model files that have BMP textures. The designers did not use a transparency in the textures or a separate alpha b/w texture. They used a specific color value that was then ...
russellaugust's user avatar
7 votes
1 answer
3k views

How to make a good glow effect around a sun?

I am trying to figure out how to make the space around the sun glow and than fade away into darkness. The sun was made in blender using cycles render and several noise textures. The glow I have ...
Pliny's user avatar
  • 173
5 votes
1 answer
2k views

How to get old Mapping and Voronoi nodes into Blender 2.82?

I noticed that some nodes changed significantly with Blender 2.81 and 2.82. Now I can't follow older tutorials, because some have different options than me. Voronoi Node is totally different Mapping ...
jachym michal's user avatar
3 votes
1 answer
4k views

How to assign a different material color to each geometry nodes instance

I need to be able to some how color each instance in a geometry nodes tree a different color. Each instance in the geometry nodes network is loose geometry. If I apply the geometry nodes modifier and ...
Anson Savage's user avatar
  • 3,412
2 votes
2 answers
5k views

Object renders black

I've imported an .OBJ file to my scene and it looks good in viewport, but when I try to render with F12 it's completely black. Clearing custom split normals data (in object data panel) removes black ...
G. Ishikawa'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
5 votes
1 answer
2k views

Can't see a glass object through another glass object in Eevee

I was just testing Eevee and found that you cannot view a glass object through another glass. Is there any workaround? It works fine only If I rotate the glass window or put my camera to the back side ...
Arjun Rajput's user avatar
4 votes
1 answer
2k views

Smooth shading / Sub Surface / Distorted render

I'm new to Blender and have been following along tutorials on youtube and I must say, and loving it. So I've reached a gap in which I can't find any help on. In short, I'm trying to design a grinder ...
Nebula 480's user avatar
3 votes
1 answer
8k views

Why is my mesh inversed when Imported to Unity?

So I modeled this sword and all the parts were separate meshes. I used a mirror modifier when I was modeling and then I applied the modifier when I was done to make the parts into solid meshes. Put a ...
James Martin's user avatar
3 votes
4 answers
1k views

Procedural Border Detection on a Flat Object

My aim is to create a border around a dynamically changing flat surface. AO and Pointiness don't work obviously. The image below is from here which illustrates my goal somewhat. I would like to have ...
Alan's user avatar
  • 147
2 votes
1 answer
2k views

Weird shading effects when rendering at long distance

I'm trying to render a cityscape, but I get some weird dark patches on the buildings all the time. The scene is just conceptional, so it's all without textures or fancy reflections/ transparacy. The ...
Guest_23456's user avatar
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
  • 12.6k
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
  • 1,090
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
12 votes
1 answer
10k views

Alpha channel through glass material instead of background

I'm trying to render some windows, reflecting an environment map, and to be transparent to let light enter inside the house. There are two windows facing each, and I need to see through both, and keep ...
Polosson's user avatar
  • 6,574
8 votes
1 answer
3k views

What does the MixRGB or Mix Shader node factor do exactly?

So on both the mixRGB and the mix shader nodes there is a factor input. But what exactly does the node do? I know that in the case of mix RGB it has something to do with the probability light rays hit ...
tempdev nova's user avatar
  • 1,543
6 votes
2 answers
6k views

Cycles Material — A kind of glitter

Hi guys, I'm trying to simulate the metal flakes that you can see in this helmet. It looks close to a metallic paint + flakes, but it definitely is something else. I found a few materials that come ...
awfulcode's user avatar
  • 243
5 votes
1 answer
14k views

Is there a Cycles equivalent to Eevee's Bloom Option?

Is there any equivalent option or process to get results equal, similar or better than Eevee's Bloom? If yes, how could I do it? I have an object with Emission Surface on Material in that case it is ...
Valter Queiroz's user avatar
3 votes
3 answers
3k views

Import Toon Shaded Character to an outside program? [closed]

I made a character and added toon shading but I can't see it. After some research it seems that toon shading is only visible if you render the image with a camera in the blender scene. I want to ...
luigi's user avatar
  • 749

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