79 votes

How can I remove all unused materials from a .blend file?

How about the well hidden deathray button? Go to the outliner, choose "Orphan Data" instead of "All Scenes" and hit "Purge All".
Haunt_House's user avatar
60 votes
Accepted

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

Such a material works by reflecting the incoming light back towards the direction it originated - since your car headlights are very close to your own line of sight, you see a strong reflection of ...
Rich Sedman's user avatar
  • 44.7k
46 votes

How do I create a reflective white material?

The floor is actually more reflective near the horizon. This effect is called Fresnel and it adds a lot of realism into the scene. Your shader should look like this: Instead of controlling the ...
Jaroslav Jerryno Novotny's user avatar
43 votes
Accepted

What is Dot Product?

Let's start with some definitions: Vector: A list of values that are all contained under the same "roof" so to speak. For instance, the location of an object in 3D space is a vector of 3 values (the $...
TLousky's user avatar
  • 16k
43 votes
Accepted

How to create clear plastic? (Cycles)

This is very similar to the thin glass problem. It can be fixed by giving it a thickness, (i.e. Solidify Modifier, as already sugested), which in some cases raises some topology problems, besides the ...
Secrop's user avatar
  • 3,576
40 votes
Accepted

How to create a procedural chevron like texture/material?

Start with Wave procedural texture and create tiling in X axis with Repeating patterns on procedural textures. After that clamp the values into stripes with a ColorRamp node set to constant: (^click ...
Jaroslav Jerryno Novotny's user avatar
39 votes
Accepted

Color vs. Non-Color data

What Non-Color Data means Choosing Color Data vs Non-Color Data determines whether or not Blender will color manage your image. Gamma Correction is a way of compressing color data and is commonly used ...
Scott Milner's user avatar
  • 4,453
37 votes
Accepted

How can I convert a node made material into an image texture?

The method of creating textures is called Texture Baking. Different kinds of textures (normal map, specular map, albedo map, etc.) take different sources, from which you 'bake' the texture - it can be ...
Jaroslav Jerryno Novotny's user avatar
36 votes

What is Dot Product?

The dot product of two vectors measures two things: how much are they "in the same direction" ? how large are they? Skipping the precise definition, we're usually interested in these properties: ...
tarulen's user avatar
  • 469
36 votes
Accepted

Scientific Illustration: Non-photorealistic rendering of sparse wireframe with dashed/dotted lines for backfacing areas - Blender 2.80

This can be accomplished by using Freestyle and Freestyle Edge Marks. No silhouette With silhouette Assuming you already have a model that you would like to render using this style, select it and ...
Robert Gützkow's user avatar
  • 25.6k
35 votes
Accepted

What is LookDev/Material Preview mode for in 2.8?

LookDev stands for "Look Development", it is the equivalent of the Material Preview mode in 2.7# with better shading and more advanced features. In fact as of Blender 2.82 it has actually ...
Duarte Farrajota Ramos's user avatar
33 votes
Accepted

How to use Subsurface Scattering in Principled BSDF

Subsurface amount Use it to scale Scattering depth down to realistic values When set to 0, scattering is disabled Values of around 0.01 are normal, since you're scaling from meters to milimeters ...
jachym michal's user avatar
32 votes

What is Dot Product?

The dot product is a way of multiplying two vectors that produces a scalar (i.e. real number) value. Geometric Definition The dot product of vectors $\vec{V}$ and $\vec{U}$ can be thought of as ...
PGmath's user avatar
  • 25.1k
32 votes
Accepted

How to make small objects emit a ton of light?

Mesh lights can be useful but they are quite an inefficient way to light your scene - especially with a large number of small lights as in your case. A better solution is to use Point Lamps to light ...
Rich Sedman's user avatar
  • 44.7k
32 votes
Accepted

Stadium Seating Letters

If you're using array modifiers and therefore have just one object, then use Texture Coordinate node like so: Now use "Separate XYZ" and "Math: Less Than" nodes to discover the ...
Markus von Broady's user avatar
31 votes
Accepted

Blurring/Feathering a Procedural Pointiness Mask

Creating Procedural Weathering Effects in Blender Okay so I ended up developing a solution to this question a couple of months back, but I see it's gained a lot of interest recently so I thought I'd ...
Hexbob6's user avatar
  • 2,038
31 votes
Accepted

Cycles Materials Math node with more than two inputs

I won't cover the complete topic about Custom Nodes, because there's too much that can be done. This is just a small compilation of things to know for writing custom nodes that work in Cycles. ...
Secrop's user avatar
  • 3,576
31 votes
Accepted

How to create this colorful metal material?

Download the blend: lighting and colormanagement, scene scale before you start creating your shader, make sure to use filmic log encoding in the scenes colormanagement tab. This will switch your ...
yann's user avatar
  • 1,973
30 votes
Accepted

Make texture visible in sunlight

"I adjusted the exposure but that didn't help"... maybe you mean: I didn't adjust the exposure "enough". "My textures they turn white" But what is white anyway? In the ...
susu's user avatar
  • 14k
28 votes

Bump Maps vs Normal Maps

Bump maps and normal maps are essentially the same thing. The primary difference is that normal maps have more information in them(because they use an rgb input) to give a more accurate bump effect. ...
Hyenaman's user avatar
  • 466
28 votes
Accepted

Star Trek: Impulse Engine Material in Blender

This problem has been a really interesting one to work on. At the start I didn't think this would be possible with 'pure' Cycles nodes - without resorting to OSL - but was surprised to discover it is. ...
Rich Sedman's user avatar
  • 44.7k
28 votes
Accepted

How do I create the left to right CRT refresh effect with material nodes?

This can be done by quantizing the x and y generated coordinates and combining them to get a unique value in $[0, 1)$ for each pixel. Then it's just a matter of creating a falloff for the scan lines. ...
HISEROD's user avatar
  • 3,938
27 votes
Accepted

Texture vs. Material vs. Shader

Shader A shader is a piece of code that is run when shading a mesh. It can be anything, including a texture, but the term is often used to refer to a shader that runs a BSDF or group of BSDFs, or ...
JtheNinja's user avatar
  • 9,122
26 votes

How can I make a texture look jagged or distorted?

You can get there using a brick and noise textures. Use a Brick texture for the randomly colored tiles Use a Noise texture to 'mess up' the edges Done.
jachym michal's user avatar
25 votes

How do I create repeating patterns with cycles' procedural textures

Jerryno answer is great but there is another way to achieve that with some simple trigonometry. 1) Use Cosine operation on coordinates multiplied by Pi (just type "pi" in node value slider). This ...
Bartek Moniewski's user avatar
25 votes
Accepted

How can I make a copy of a material?

You can copy and paste material settings from the material tab. Note that you need to add a new material before you paste copied settings into. Blender 2.7x
stacker's user avatar
  • 38.5k
25 votes

How can I make a copy of a material?

Assign the 'base material' to the desired object and click Add a new material button: This automatically creates a copy of the 'base material'. Blender 2.7x
p2or's user avatar
  • 15.9k
25 votes
Accepted

How do I achieve this "hexagonal armor" animation effect in Blender?

Enable addon Extra Objects Add Object Shift+A > Mesh > Extras > Honeycomb in desired amount of cels setuped in properties panel (left-bottom corner of 3Dview) with max Edge Width that fills ...
vklidu's user avatar
  • 36k

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