Blender Stack Exchange
Blender Stack Exchange

Questions tagged [volumetrics]

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

615 questions
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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 missing? Simple scene No Gods Rays
atek
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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 effect. For this I created some spheres within…
Aardo
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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 have it set to 2, does this mean it will only go 2…
icYou520
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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.
user40079
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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 to achieve is something like this: A Fog, which…
Fabrice Magdanz
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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 a corner cut out of my brain to expose its…
ajwood
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Volume from Image Sequence

Is there a way to create Volumes (Volume Object Type in blender 2.83+) from Image Sequences? And/Or can the Volumedata be accessed/modified with python? This would be very nice for scientific visualizations and for creating 3D-Objects from medical…
icalvin102
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How make clouds less square?

I am trying to create clouds using cycles, but they are looking too squared. I am using volume and the modifiers are: The mesh I am using is a simple meatball. How can I create clouds with more details?
Vinicius Morais
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Planetary Clouds

Is it possible to create a planetary-volumetric style clouds on the faces of a sphere? Every attempt I try always comes out to look too 2d when approaching the image closely. I tried the volume output but as it says, it only keeps the stuff inside…
Trevor N
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Control density of a volume in a more methodical way

I would like to have a volume mesh, let's say a sphere, that gets progressively more "misty" Imagine the mesh being at very high desnity for the top hemisphere, then density becomes lower in the lower hemisphere to the point that it basically…
Maik Xhani
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Fastest way to make a fog gradient?

I need to do a fog that's dense at the bottom and gradually disappears to the top of the box. I adjusted a gradient texture with mapping, but is there a more straighforward way?
francois gibon
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Large scale volume lights

I'm setting up a large scale space scene, and trying to get some volumetric lights - like god rays. However when scaling up the volume cube, to sizes like 10,000 units the god rays disapear. I can only see either black volume, completely opaque or…
Lukas
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Using Transparent Background with Volume Scatter

everyone. I need your help with. I'm trying to use the Volume Scatter feature with a transparent background in Blender Cycles. I have transparency turned on if that's what you are wondering,but every time,the background isn't transparent like I want…
JeremiahTDK
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How to loop an imported VDB file

Is there any way to loop an imported VDB file? I've imported a VDB that is set up to be looped from Janga FX. It is only 128 frames long, but I want to make it loop multiple times in Blender 3.5. Any help would be greatly appreciated. Thanks, Troy
Troy McClellan
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Volumetrics and why mine is not working so well

So I have a light that is shining through some Gobos behind my sword. Now the problem is the cubes are not really blocking the light enough to provide nice effect. Why would this be ? I am new to volumetric so I might be missing a key step After…
Valnus RSA
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