Questions tagged [volumetrics]
Questions about rendering with volumes (smoke, fog, etc.). Use this tag for both Blender Internal and Cycles.
602
questions
27
votes
2
answers
31k
views
How to Create Dust Floating in the Air?
Quite impressed by all of Gleb Alexandrov's scenes with some amazing dust floating around.
(To see what I'm talking about > http://www.creativeshrimp.com/lighting-tutorial-atmospheric-effects-dust-...
- 1,979
25
votes
2
answers
3k
views
Volumetric Windows 10 logo effect
I'm trying to recreate the windows 10 background effect on a logo I've made in blender.
Half the logo has a glass like material, the other half has a steel like material. And I'm using cycles at the ...
- 353
20
votes
4
answers
32k
views
Rendering smoke in Cycles?
I am trying to render smoke in cycles, but the relevant blender manual page is designed for Bender Internal. I have everything set up except for the material.
I imagine you would set up the material ...
- 5,669
20
votes
2
answers
5k
views
Distance from the surface as an input node for use with volumetric materials
I would like to create a material that has a volumetric component whose local Density depends on the depth of each volume point below the surface.
Can the information "how deep below the surface is ...
- 12.8k
19
votes
1
answer
14k
views
Using volumetrics in Cycles I have to have the light strength super high
I have to have a spot lamp strength VERY VERY high to have these light rays come through 300000.0 and look good. Sounds crazy doesn't it. Maybe it doesn't matter but it doesn't feel right. Will I ...
- 895
19
votes
1
answer
8k
views
Correct way to render crepuscular rays in cycles?
While trying to use the new cycles volumetric rending features to create crepuscular rays (with the intention of updating my answer here), I have found this to be a little trickier than I anticipated.
...
- 157k
18
votes
4
answers
5k
views
Voxel data in Cycles
Is Cycles able to render voxel data from an external file?
I can create the volumetric effects that I'm interested in by plugging a texture node into volume absorption and volume scatter shaders, ...
- 10k
16
votes
3
answers
4k
views
Using image sequence of medical scans as volume data in cycles
I know it's possible to do this in BI, but I need your help to do this in cycles.
For now, I have a setup to use an image sequence as volume but it only shows 1 slice/frame. I'm using generated ...
- 8,264
16
votes
3
answers
9k
views
How to properly render smoke on a transparent background?
When rendering volumes with Film > Transparent enabled, the alpha appears to be the wrong type (premultiplied/straight).
In the 3D view it works as expected:
This is a known bug.
Is there any way to ...
- 157k
15
votes
1
answer
2k
views
Volume Gods rays are not well defined
I have a simple scene. Added an icosphere and emission to it. Set the volume scatter nodes. I can't find the rays coming out. Just at the fog and there's no clear light coming out. What setting am I ...
- 9,882
15
votes
2
answers
24k
views
Is there an easy way to make volumetric clouds for Cycles?
I'm working on an animation that takes place on a plane. I'd love to include the big detail of clouds moving past through the windows, but I'm using Cycles. I have no experience with the particle ...
user8158
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 ...
- 317
14
votes
2
answers
5k
views
Create procedural spiral pattern
I'm trying to make a galaxy in blender. If I use an image of a galaxy to get the spiral shape it becomes a 2d image projected into the 3d volume. To avoid this I wanted to use a procedural method, but ...
- 163
14
votes
1
answer
5k
views
Render semi-transparent volume with cycles
I want to render an image of a fire in cycles, but as a png with a transparent background.
Without a transparent background, the output image looks like this:
But as soon as I tick the "Transparent" ...
- 243
13
votes
1
answer
2k
views
Is it possible to change the IOR inside a volume?
For instance, is it possible to simulate effects such as heat haze or other kinds of mirages which are caused by air with differing/changing refractive indexes?
Plugging a procedural texture into the ...
- 157k
12
votes
4
answers
6k
views
Emission: Red glow while the object itself is white
I want to make something like this in Blender:
So I created a Torus and I created two emission materials for it (one for the right side and one for the left side) with two different colors and ...
- 480
12
votes
1
answer
5k
views
Create a gradient effect, like for coffee?
I'm trying to create a nice little mug with some coffee in it:
I can't quite figure out how to describe the issue, but I guess the coffee looks too dense. There's usually a gradient falloff effect on ...
- 3,908
12
votes
1
answer
2k
views
Why is this transparent material rendering black?
I have a beer setup in my blender scene. It's a basic glass shader for the glass containing a fluid mesh with a glass + volume absorption material with a tint.
I don't understand why the fluid is ...
- 761
12
votes
2
answers
1k
views
Is there any way to convert generated volumetric shader into the mesh?
Now that we've got Volume to Mesh modifier - which is so cool - we can make meshes from the simulations, like Open VDB sequences, etc. But it seems that it doesn't work with procedurally generated ...
- 1,049
11
votes
1
answer
19k
views
How to do volumetric lighting for a forest scene?
I have scene that looks like this:
And I want to add volumetric lighting to it so that light forms a rays of light when it go through the trees like on this example that I found in youtube:
But the ...
11
votes
1
answer
2k
views
Procedural volumetric texture generated from a script
I need to render a 3D density plot of custom mathematical functions as part of a scientific visualization. I've seen some demos and it seems that Blender is capable of volumetric rendering. My ...
- 211
11
votes
4
answers
28k
views
Domain boxes show up in cycles render
So I recently made the switch to cycles rendering and smoke modifiers, but it's been giving me loads of problems already.
This is what the model looks like:
And then when I go to render it, this is ...
- 289
10
votes
4
answers
10k
views
How to make Volumetric Scatter fade adjustable
In Cycles, I'd like to create a misty torus. Create torus, Volume Scatter note into the Volume Material Output node. Done.
But I'd like to be able to adjust the density of the scatter with respect to ...
- 1,197
10
votes
1
answer
5k
views
Question about volume samples
I just want to know if I am understanding this correctly.
Lets pretend my domain is 18 vox wide, if I want Cycles to render all the way through, do I need to set the volume samples to 18?
Below I ...
- 5,419
10
votes
4
answers
5k
views
How to create a hologram projection with light rays?
I am attempting to make a template for holographic effects in blender for a project I'm working on, however I'm not sure how to create a lighting effect for the projection of the hologram (The god ...
- 307
10
votes
3
answers
2k
views
How to achieve white "fog" effect within an ice cube?
I modelled a set of ice cubes. I'm content with the result, but when I look at an actual ice cube from my fridge, it has a white foggy cloud within, like a microstructure. I'm trying to recreate that ...
- 1,572
10
votes
1
answer
4k
views
Create light rays in Cycles [duplicate]
I am trying to create something like volumetrics with a falloff: beams of light that shine visibly into the air from an emissive object, becoming gradually less visible as they get farther from the ...
- 242
10
votes
2
answers
7k
views
How to create fire materials using the new Principled Volume node that visually look the same as the "old method" of fire materials?
There is a new volumetric shader node called "Principled Volume" in Blender 2.79 as of this commit. It appears to support a new temperature attribute, using blackbody temperature.
Using the ...
- 12.3k
10
votes
1
answer
2k
views
Visualizing 3D voxel data in Blender 2.8
right now I'm trying to visualize my scientific 3D data in Blender 2.8. So blenders built in textures or smoke simulations do not lead to the goal.
I've read that older releases of Blender do support ...
- 141
9
votes
1
answer
18k
views
Atmospheric lighting in cycles
How would I go a about making volume light beams?
I have have tried various tutorials, but they must be for a older version. as applying them does seemingly nothing.
A link to a functioning ...
9
votes
2
answers
2k
views
Colours in OpenVDB volumes
*For more detailed information; see below
I am working with (OpenVDB) volumes in Blender, which I use to create animations. This is an example:
Both sides are different .vdb files.
Now, I want to ...
- 85
9
votes
1
answer
9k
views
cycles node setup for volumetric shader
I downloaded blender 2.7 to to do some volumetrics in cycles.
How to set up material nodes because I have no idea, everything I do gives me a black diffuse.
- 321
9
votes
2
answers
14k
views
Scattering and anisotropy usage
Apart from artistic purposes, what are some practical uses of negative, zero or positive anisotropy? I do understand how it affects the scattering direction but I am not sure when is it useful.
- 598
9
votes
1
answer
5k
views
How to eliminate Cycles artifacts with many overlapping volumes?
I have encountered an issue with Cycles Volumetrics in a recent scene. I am using Blender 2.72, and both CPU and GPU render options. In both I get a solid black artifact when I have two volumes ...
- 19.2k
9
votes
3
answers
18k
views
Atmospheric fog in Blender 2.8
I am a long time Blender user and I built some nice scenes with it. I also love the new 2.8 but ever since I was working with volumetrics in Blender I was never really happy with it.
So what I want ...
- 101
9
votes
2
answers
12k
views
How can I make a simple volumetric light on Cycles?
I'm trying to do a volumetric light on Cycles, and I've followed tutorials, but nothing has worked yet. How can I make a proper volumetric light in Blender, like the following one?
But to leave the ...
- 5,317
9
votes
1
answer
3k
views
cycles volume rendering 3D image texture (CT or MR dataset)
Is it possible to render with cycles a 3D texture from discrete image data (eg. image sequence)?
Basically I'm trying to get volume rendering of medical data with cycles.
- 191
9
votes
1
answer
343
views
How to get the current step number in volume render
I need to get the current step number while rendering a volume object
the step used for sampling the volume :
something like in light path node " transparent depth , ray depth "
- 19.4k
8
votes
1
answer
13k
views
Controlling volume density
How can I control the volume density values at different locations in a mesh with volume shaders?
I know that noise textures can be plugged in to the density factor slot of a volume shader (producing ...
- 3,302
8
votes
2
answers
2k
views
How to shift noise texture without distortion?
I am struggling with understanding how to shift the noise texture connected to another noise texture without distorting the overall shape. I have tried connecting them to same mapping, and to separate ...
- 101
8
votes
3
answers
4k
views
Volumetric Shading in Cycles
I understand that there is no proper way of doing volumetric shading in cycles yet, but I'm curious to know if there is a way to fake it. Effects such as clouds or fire.
- 842
8
votes
1
answer
911
views
Render 3 dimensional scalar field
I have a function which assigns to "every" point in space (x,y,z) a scalar value d. I want to, somehow, visualize this function ...
- 297
8
votes
2
answers
959
views
How to create high altitude clouds? (cirrus and cirrocumulus)
Pretty much all cloud tutorials show how to make Cumulus clouds, or some random blob of a cloud, but I'm looking to create high altitude clouds, which you can see below.
I'm most interested in the ...
- 1,419
8
votes
1
answer
510
views
Volumes with space-dependent light intensity
I would like to use Blender to render pictures of atomic orbitals like in the following picture
or like in this video. This seems to need some light-emitting volume whose intensity is described by ...
- 305
8
votes
2
answers
2k
views
3d Volume from 2d Texture
is it somehow possible to generate volumetric information from a 2D Image Texture?
I experimented already quite a bit, but with no succes. I thought about using the RGB, or better said, the BW-...
- 81
8
votes
1
answer
1k
views
How to assign colors to Point Density based on data values?
I have a file containing approximately 900,000 x,y,z data points, each with a list of physical values at that position (temperature, density, chemical composition, etc.)
I have written a Python ...
- 733
7
votes
3
answers
18k
views
Why doesn't Volumetric follow the shape of Mesh in Eevee?
So I was in the middle of making a ball-shaped smoke, but the volumetric effect didn't work following the basic shape. It remains cube in Eevee Blender 2.8; while in Cycle it works, but in Cycle it ...
7
votes
3
answers
12k
views
How can a light cone (volumetric) be setup with cycles?
I tried to reproduce the results from the Docs on volumetric lighting unfortunately the video link is broken. And I might have overlooked some related settings.
The spot light is barley visible on ...
- 38.3k
7
votes
2
answers
3k
views
Why does refraction + volume scatter cause a much darker result?
I've noticed that glass objects tend to turn really dark when adding volume scattering.
It seems the volume scatter shader gives a much different result when a refraction shader is used in the ...
- 157k
7
votes
2
answers
3k
views
How to make an object transparent to the freestyle pass?
In Blender 2.75a, I'm making a render using Cycles and the Freestyle pass. My scene contains a mesh with a smoke modifier that I'm rendering through a volumetric shader.
The boundaries of this mesh (...
- 12.8k