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Questions tagged [shaders]

A shader is a computer program that usually runs on a GPU and 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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2
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1answer
242 views

Help with rendering shadows properly

Im pretty new to blender and am in a bit of a bind here. I have this distorted water simulation that i am attempting to make look like snow (not the best but it works for what i need it for) and i am ...
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0answers
1k views

Cycles SSS surface colour [closed]

I am looking at improving a characters Skin material node setup. Most of the Node setups I have seen for cycles, including the Arnold Skin port basically involve (not including gloss, bump etc) ...
4
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1answer
2k views

Can't change to smooth shading

I am building a car engine and I want to set it to smooth shading. But for some reason it does not work. Has anyone an idea how to fix that? Here you can download the .blend file.
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2answers
5k views

RC 2.7 Blender/Volumetric Shading Cycles

I went onto blender.org and saw a Release Candidate for Blender 2.7 came out. In the description it seems the long awaited volumetric shading in cycles has been released. From what it sounds like is ...
1
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2answers
346 views

volumetric shaders missing in blender 2.69

I have installed blender 2.69 and it says that volumetric shaders will be supported but i cannot find them. Do i have to download then as an add on?
0
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1answer
268 views

I'm trying to learn Blender to animate. Am I doing it right? [closed]

The idea of making 3D animations to tell stories has always been attractive to me. Yesterday, I decided to stop hesitating and began learning to use Blender. I am using the YouTube channel tutor4u's ...
4
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1answer
4k views

How to mix more than two shaders?

How can I go if I want to mix more than two shaders? Lets say that I have a diffuse and a glossy shader pluged onto a mix shader and than I want to put in a third shader (or more). How can I do that?
22
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2answers
32k 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....
0
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1answer
1k views

Bump map connected to Glossy shader Normal input causes line artifact in render

I wanted to plug a bump map into the normal inputs of a Diffuse and a Glossy shader. But if that is done, for some unknown reason it renders only on part of the mesh. A line across the image will ...
0
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0answers
30 views

Why do i get a strange black shadow when i smooth my mesh? [duplicate]

I finished the mesh but went i try to smooth it i got a rare black shadow : 3D viewport - no smooth 3D viewport - smooth Render - smooth Render - no smooth
6
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1answer
3k views

how can I make an emission shader shine through a transparent material?

I am trying to use the emission shader to make a light, but I realized that it seems to be only shining through to a limited extent: These are the nodes for the light: These are the nodes for the ...
4
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4answers
5k views

How to make a mesh look like it was 3D printed

How can I make a mesh "look 3D printed", i.e. you can see the layers. e.g.: You see all those layers? How can one do this? Maybe a bump map? or is there an option to separate a mesh into pieces, i.e. ...
2
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1answer
598 views

Is it possible to render AO with the OpenGL render?

Is it possible to render AO with the openGL render? I know there is a technique called SSAO which is used in some video games, so it should be possible. How can I achieve this?
2
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2answers
3k views

Cycles toonshader vs Blender Internal shaders

Is Cycles toon shader more accurate than Blender internal toon shader? I,m currently working on a Webcomic and would like to have my characters as 3D characters in a 2 tone cell shading style. This ...
2
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0answers
256 views

Get name of bgl_RenderedTexture in Python

I want to let the GPU create a mipmap for the framebuffer texture that's available as bgl_RenderedTexture in the custom filters. It shouldn't be difficult. I just put some code into the post_draw ...
13
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3answers
13k 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 ...
15
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5answers
3k 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 ...
5
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1answer
2k views

Is there a way to use Textured Solid without getting a Backface Culling effect?

I am trying to have a blender file using Blender 2.69 that allows you to look around and also see textures. Putting the shading on GLSL and turning on Textured Solid make the textures render great, ...
5
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1answer
1k views

How can I create a single Cycles texture with a different image for each object it's assigned to?

For a model I've made I'd like to keep the basic properties of the Cycles material (shader type etc) the same for most of the objects that make up the model, but have a different image mapped to for ...
2
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2answers
2k views

Is it possible to simulate Fluorescence in cycles?

It it possible to create a fluorescence shader in cycles? From Wikipedia: Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation. More ...
2
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1answer
937 views

Compositing output image shading

Is it possible to control the shading via a node in the compositor? I would like to generate two output images, one which has material shading and one without any shading - just the colors from the ...
12
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1answer
1k views

OSL and raytracing

I don't know much about the Open Shading Language, but I need to know if it can do a few things before I decide to spend the time to learn it. Can OSL manipulate rays that hit surfaces? Such as: ...
11
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3answers
8k views

Is it possible for a emission shader not to cast shadows?

Is there an option, like on lights sources, to tell the object that has an emission shader to not cast shadows in the scene?
43
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6answers
32k 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. ...
5
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1answer
320 views

Which normal input socket should I use when I have a mix between shaders?

Since we have the option to use normal maps in Cycles via the normal input socket, this question frequently pops in my head: In the simplest mix, diffuse and glossy, should I connect the normal map ...
7
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1answer
2k views

Make White Transparent shader that is not transparent?

How can I make a slightly transparent white Transparent material in cycles, when making the Transparent shader white makes it completely transparent and invisible?
7
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2answers
3k views

Convert cycles closure (shader) output to colors?

Is it possible to convert the output of a cycles Shader node to colors? For example to use an ambient occlusion shader output to multiply or darken act as a mix factor between other shaders?
9
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1answer
2k views

How exactly does the Sigma parameter affect the Velvet shader?

How does the Sigma value of the Cycles Velvet BSDF shader work? Intuitively, it seems to serve as some sort of ceiling value for the shading. How does it affect the light bouncing? I've looked at the ...
12
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2answers
15k views

Different image textures for one material (Cycles)

With Blender Internal (2.79 and older), you can add a UV layer, assign images to each face, Then enable the materials Face Textures option. Is there some way to to ...
16
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2answers
3k 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.
2
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1answer
207 views

Any word on custom closures, or new ones? [closed]

In an attempt to re-create Valve's Half-Lambert effect in cycles, I found out it is basically mathematically impossible at the moment, without patching cycles. Does anyone know/have heard/rumored/...
16
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1answer
10k 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?
13
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2answers
14k 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 ...
15
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1answer
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. ...
39
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9answers
35k 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 (...
37
votes
3answers
13k views

Iridescence In Cycles?

Is it possible to create an iridescence shader in Cycles? Specifically for something like DVDs, soap bubbles, engine oil, etc.. I know about this technique for a DVD material, but it doesn't properly ...
6
votes
1answer
965 views

Why is the result of this GLSL shader asymetric when rendering with stereo “Side-By-Side”? [closed]

I am trying to achieve an inverse lens ditortion for the Oculus Rift during Side-By-Side stereo in the game engine. I am using a custom Filter2D with this GLSL shader. The distortion can be achieved ...
4
votes
1answer
1k views

Can I access the render screen size in a custom filter 2D in the game engine?

I am using Blender Game Engines Filter 2D to make a post effect with GLSL. In an fragment shader applied on the frame buffer, I want to access the size in pixels of that buffer in GLSL. ...
7
votes
2answers
2k views

Is it possible to limit the “Cycles Shadow from Transparency” per Object?

There is an option in the properties panel, Render > Light Paths > Shadows that toggles "using transparency of surfaces for rendering shadows" for the whole scene. I like to render architectural ...
70
votes
1answer
27k 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?
12
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2answers
3k 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 ...
23
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2answers
10k 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 ...