Questions tagged [volumetrics]

Questions about rendering with volumes (smoke, fog, etc.). Use this tag for both Blender Internal and Cycles.

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19
votes
4answers
27k 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 ...
15
votes
3answers
6k 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 ...
9
votes
1answer
3k 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" ...
15
votes
1answer
7k 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. ...
7
votes
1answer
9k 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 ...
6
votes
1answer
4k views

Volumetric Spot Light with Cycles

I'm using blender 2.76 rc1 with an AMD Raedon HD 7900 series, I'd like to create a volumetric spot light with cycles render. I set the volume scatter (density 0.1) in volume and mist pass in world, ...
3
votes
1answer
4k views

Why doesn't an Environment texture appear when the world has a Volume Scatter shader?

I'm working on lighting a scene in which I need to have both an Environment texture for the background and Volume Scatter for light cones, but when I check the volume section in World setting and ...
8
votes
1answer
3k 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 ...
18
votes
1answer
11k 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 ...
6
votes
3answers
8k 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 ...
9
votes
2answers
10k 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 ...
25
votes
2answers
16k 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-...
14
votes
2answers
2k 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 ...
7
votes
1answer
1k 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 ...
14
votes
1answer
2k 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 ...
13
votes
2answers
16k 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 ...
11
votes
1answer
2k 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 ...
11
votes
4answers
3k 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, ...
3
votes
1answer
10k views

Is it possible to make visible spotlight lightrays? [duplicate]

I'm using a Spotlight on one of my scenes, first I planned to make the effect of the lightrays on other editing software, but maybe it's possible on Blender. It is possible to make a spotlight look ...
20
votes
2answers
2k 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 ...
12
votes
1answer
1k 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 ...
7
votes
1answer
6k 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 ...
6
votes
1answer
2k 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.
1
vote
1answer
1k 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 ...
8
votes
1answer
4k 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 ...
3
votes
2answers
3k views

Volumetric Lighting is not working

I have a simple setup to try out Volumetric Lighting. I have a spot lamp and Volume Scatter set for the World. The cube has a window for the light of the spot lamp. But no Volumetric Lighting. I ...
6
votes
3answers
17k 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 ...
2
votes
1answer
735 views

HDRI With Volumetric to Create Throw Pattern?

I have a scene below where I am wanting to get an HDRI image to come in through the windows and light the scene in the window areas and have a god ray like effect. I want to do this with a volumetric ...
0
votes
1answer
3k views

Particle not showing up in Cycles

I wish to create some dust particles but my particles are not showing up. I used some generated objects for the matter, put them in a group and use the group for the particles. The size is scaled up ...
9
votes
4answers
2k 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 ...
8
votes
4answers
4k 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 ...
8
votes
1answer
3k 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 ...
4
votes
1answer
2k views

Volumetric gradient based on density?

I am trying to make a material that is translucent at the surface and opaque in the middle. How can I control the gradient? I would like the gradient to correspond with the mesh; i.e. not simply ...
5
votes
1answer
2k views

Rendering a 3D volume

I'm playing around with ways to visualize an MRI image of my head. I've extracted my brain, so there are non-zero brain voxels in the center, and zeros to the edge of the image. I'm imagining having ...
6
votes
1answer
1k views

Volume scatter shader causes black spots

I am following Andrew price's video on making clouds but my clouds are rendering with black spots on them. I have tried turning up the maximum transparency value under light paths but there is no ...
6
votes
1answer
290 views

Cycles: Generate 3d coordinates before modifier stack is resolved

Im trying to create a volumetric material that uses a 3d texture. I need this volumetric to be animated along a curve. Right now, I have the material using generated coordinates. But the 3d texture ...
5
votes
4answers
2k views

transparent background for volumetric smoke? Bug?

I'm trying to use transparent background in a simple smoke simulation. As soon as I check transparent, in the film settings (cycle), the image loose the color (it is indeed transparent but black). ...
5
votes
1answer
564 views

Smoke hi-res fire artifacts in Cycles?

When rendering smoke/fire simulations with cycles I sometimes get some random lines/artifacts on my render. Do you have any idea what might be causing this? There are also some issues with ...
5
votes
1answer
4k views

Why there's not homogeneous volume scatter in 2.72?

There was an option to render volume in blender 2.71. I was used to doing that like in this tutorial: http://www.blenderguru.com/tutorials/make-atmospheric-lighting-blender/#.VKkh0CuG_h4 But now, in ...
4
votes
1answer
869 views

Volumetric Lighting not showing very well

I'm making an old dusty attic render and I've come across a bit of a problem. (Or several) I'm using 300 samples and the Denoiser, and as you can see in the following picture the rays are not showing ...
2
votes
1answer
7k views

Volume Scatter in World makes the sky turn black [duplicate]

While using the "Volume Scatter" option in Blender the Background turns Black. (I am using Blender 2.79). Here is my issue in detail. The first image below shows a normal scene with Blue sky (Set ...
1
vote
1answer
251 views

Replicate the light coming from a projector

Trying to create projection light to put on a scene like this 1 Click to enlarge. Example of the light I want to create. How would I do something like this?
8
votes
2answers
1k 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 ...
12
votes
1answer
3k 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 ...
15
votes
1answer
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 ...
7
votes
2answers
507 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-...
9
votes
2answers
3k 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 more or ...
4
votes
4answers
4k views

Using cycles volumetrics to make planet's atmosphere

I have seen the tutorials involving the use of the compositor to produce an atmosphere, but I wanted to be more authentic. Since Cycles now has volumetrics support, I have tried using the sphere ...
0
votes
0answers
307 views

Creating dust deflated by wind

I want to create spaceship landing scene where it's engines produces a lot of dust while the ship is descending to the ground. How can I achieve that crazy chaotic dust effect?
2
votes
1answer
602 views

Is it possible to render other materials besides volumes using a procidural texture to define “density”?

In other words, is it possible to render an image of a cube like this: But make the "spheres" refractive as opposed to scattering volumes? When I attempted with this (I did not expect it to succeed):...