Questions tagged [volumetrics]

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

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Eevee Volumetrics Tile Size

When using EEVEE Volumetrics the minimum Tile Size is limited to 2 pixels. Why it is not possible to use 1 pixel or even 0.5 pixels? Using higher Global Sampling does not help to refine the VDBs, ...
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24 views

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 ...
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Volumetric lights - origin point seen as a single point even with large radius

What can I do about point lights having very intense point of light at its origin when using volumetrics? I realize this is the nature of a 'point' light, but what about when the 'radius' is turned ...
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1answer
18 views

OpenVDB file and Blender Cycles

i imported a open vdv file and render it but I looks blocky and has weird lines in the end render I didn't change any settings from the volume, what can I do to make it, well not look like garbage
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Blurry nebulae in Eevee

I'm trying to render a scene in which I have nebulaes made from volumetrics. EDIT : I forgot to mention that it is a "flythrough" scene, the camera is flying through 4 successive volumetrics ...
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Loading Open VDB Sequence failed

I would like to purchase Embergen. There are free open VDB sequences available at https://jangafx.com/software/embergen/download/free-vdb-animations/ but after importing a .VDB sequence into Blender I ...
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1answer
25 views

Blurry volumetrics in viewport?

I am trying to make a procedural cloud. I followed a couple of tutorials, but every time I change to a volume shader, it gets blurry. This is the first time I'm messing around with this kind of stuff. ...
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12 views

Cycles volume render failure

I am trying to render a very straight forward scene in cycles with some volume. I have tried creating a large cube with volume, and I have also added volume to the World. Everything looks great in the ...
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1answer
20 views

Volume absorption boosts light levels of scene and messes with shadows

The first has a volume absorption node that is set to full white and 0 density for the water, it also has a glass BSDF set to white and an IOR of 1.33. The second image is the same, except the volume ...
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1answer
24 views

How can I make any mesh be filled with smoke?

I tried putting volume scatter and other nodes into the volume output in the node tree of a monkey but it creates a cube of volume around that monkey, how can I make it so it's like a monkey shaped ...
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Volume appears extremely dim in render compared to rendered view in the viewport

So, I ran a fire simulation, then imported the result as a .vdb file. I applied this shader: and that produces this result when viewed in the rendered-mode viewport When I hit F12 and render the ...
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1answer
12 views

Imported openVDB sequence from another scene moves around randomly

Like the title says, I did a smoke sim in another scene and tried to import the vdb sequence to a new one and the whole volume moves about semingly randomly, please help im ripping my hair out over ...
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Volume Scatter Works In Eevee But Not Cycles. Am I missing something?

I wanted to try and render a Star Trek borg scene I have in cycles to see if I could bump up the HD-ness of the outputted image file but noticed that when switching the render modes, anything that ...
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1answer
77 views

How to plot Pasta Shapes with Volumetrics?

For NodeVember this year, I’d like to try and plot some of the pasta shapes in the book Pasta By Design. The book contains equations that describe the shapes of pasta. I’d like to use these equations ...
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2answers
124 views

Create a trail effect (Meteor)

I am trying to show a sphere with a trail, like the one shown in the image. I have tried using keyframes and moving the object from one point to another, and then enabling motion blur. This is not ...
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Volume Scatter in Cycles Turning world black [duplicate]

I am working on creating a sunset and am having trouble getting the volume scatter node to not turn the entire world black. I have already tried numerous suggestions from other posts including ...
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35 views

Volumetric light causes lights to flicker in eevee

I'm having a problem where the lights on my car (and the area lamp) are flickering when i play the animation. I used a cube with the principled volume settings and the flickering is only caused when ...
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1answer
43 views

How to ease the edges of a volumetric texture?

I have a volumetric texture, and I don't know how I can ease the edges of this texture, to rub the "cube shape" of the volumetric texture. I also need this to be keyframed. I tried to use ...
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1answer
69 views

Workflow for filling complex shapes with a 3D pattern

Currently for work I'm supposed to visualize honeycomb patterned cardboard filling in more complex shapes, and I'm struggling a lot with finding a good workflow for doing this. The first option I ...
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44 views

Create mesh from procedural volumetric material 'isosurface'

So Rich Sedman wrote an answer / tutorial on how to make a random / organic scaffolding structure using procedural volumtetric materials. He essentially defines an isosurface in math nodes and uses ...
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39 views

Blender crashes when I use volume absorption

I recently began using Blender. I was attempting to add volume absorption to a transparent material, however when I did, Blender stopped responding and crashed. It only crashes when I try to render ...
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17 views

Eevee volume emission texture space is cubic even for a cylinder solid [duplicate]

I created a solid cylinder with an emitting volume material. In render mode, the glow looks cubic instead of following the circular profile of the cylinder. This could be because the texture space is ...
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22 views

Hollow VDB while rendering?

Rendering the VDB in viewport will give me the same, hollow-looking result as in the final render, but messing with the "wireframe" option underneath viewport display will give me a thicker ...
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1answer
147 views

Is there a way to calculate the volume difference between two objects?

I'm relatively new to Blender so apologies in advance in case this is too basic of a question. Trying to come up with a way to compare two files and identify a volumetric difference between them. For ...
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2answers
67 views

Apply volume to a spherical texture?

I have a quick texture applied on a UV Sphere. It is meant to be a spherical nebulae that I animate by keyframing the nodes settings (mostly color ramp, noise textures and color dodge mix shaders). ...
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35 views

Volume Absorption not darkening

I don't understand why my "coffee" still looks like water. What can I change to make the coffee darker but still realistic? I couldn't post my screenshot, so please let me know anything I ...
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25 views

Painting with smoke

I'm trying to paint with smoke. As described in the dynamic paint guide on miikahweb and shown on his Youtube channel. Is this still possible in blender 2.9/2.8? If so, how?
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2answers
77 views

Rendering smoke to texture sheet

Is there a way to bake an explosion in blender as a 3D texture with each slice of the volume rendered to a texture sheet? Here is an example done with Unreal 4. If there is no default way, I made a ...
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2answers
99 views

Why am I unable to color my volumetric clouds white?

I am trying to render a cover of white clouds as seen from above. I am using the Principled Volume shader, using gradient and noise textures. It now looks as follows: However, the clouds are very ...
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1answer
40 views

render animation with eevee, volumetric disappear some frames

i have a bug with eevee when i rendering, my volumetric ambiance disappear sometimes without any reason. I noticed it once a sequence was rendered, some frame, totally random, i haven't my volumetric. ...
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2answers
229 views

Principled volume shader's weird behavior in Eevee

I applied a material with Principled Volume (or Volume Scatter) shader only to the cube but it seems like the whole world is affected too. This only happens with EEVEE render or in Material Preview, ...
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1answer
43 views

Rays emanating from a point on the surface

I am trying to create an effect in cycles (like the attached photo), where points on the surface emit rays (like god-rays). I have tried adding a spot light at the location where I want this, along ...
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46 views

How to export a volume as a separate render pass and composite it correctly in Photoshop?

I have one render layer with objects and one render layer with a fog volume. The objects are set to Holdout on the layer with the fog. The combined composite output (left image) looks correct. It also ...
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22 views

Object is transparent against background

This scene was nice to work with for a while, but somehow I managed to push a button that makes the objects transparent against the background. How can I get this back to normal?
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22 views

is there way to hide the start of a light and only show it after it touches an object?

I am doing a render in blender and I wanted to add a dusty old feel to a scene so I added volumetrics but as soon as i added it you could see the source of the lights inside and it looks really bad. ...
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2answers
144 views

How to create volume scattering material not throwing shadow?

I'm using Blender 2.83 with Cycles and I'm an absolute newbie to both. I'd like to visualize light rays in a part of the scene (like godrays). For this I put an object using volume scatter material ...
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1answer
123 views

How to make fog with an image plane?

I was trying to remake a scene from Assasin's Creed. It features the main character jumping from a pretty large building. I already have two volumetric lighting in my scene. Its literally impossible ...
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1answer
273 views

OpenVDB does not show in render?

I was trying to render out a sequence with OpenVDBs imported from Houdini and all of a sudden Cycles stopped rendering out the actual volume but only the reflections caused by it along with my model ...
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1answer
33 views

Blender Evee volumentrics aren't working as they are supposed to

why does my cube look so bad while the other one looks so crisp and detailed
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1answer
46 views

Starlight spotlights w/ volume help

I'm trying to create something similar to this image's sky-box. I tried cutting holes into a plane and shining a spotlight through. My attempts end up with the light hitting the ground (which I don't ...
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0answers
25 views

Displacement works in viewport but not in render (Cycles)

My problem is that my noise displacement map is working well in the viewport (Cycles rendered mode) but when I f12 render the image, the displacement just disappears. What am I doing wrong? enter ...
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1answer
35 views

Volumetrics with an alpha background, can it be done in cycles?

I have a scene with an egg cracking slowly. Inside the egg is a bright light. I used a cube to create some volumetrics and the result is great but I need a transparent background. I found a couple ...
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2answers
519 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 ...
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0answers
33 views

Cannot Export as GLTF file with volumetric mesh in Blender 2.83

I am trying to export a personal project I made in GLTF format. The problem I am getting is the volumetric mesh looks black when exported. Is there any way how to overcome this problem[][1
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0answers
174 views

Flame shows in Solid view but not Rendered view (in Eevee)

I'm trying to use Quick Effects -> Smoke to start generating a fire simulation, selectively turning off smoke settings. I work primarily in Eevee. The simulation displays properly when I'm in Solid ...
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1answer
195 views

Where is the volume step size option in Blender 2.83?

Here is a picture of what I see in the volumes dropdown: I tried going through all of the dropdowns in the render settings but still, no such luck.
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1answer
33 views

3d reverse masking of volumetric

Is it possible to create a volumetric cube but mask only the space of that volumetric cube by a mesh? Hence if I put Suzanne inside the volumetric I only see her? The effect I am looking for is how at ...
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1answer
1k views

God Rays through window pane: Cycles

I'm creating a scene for a project and I wanted to go for the god ray effect achieved by the lights passing through the window. I added a mesh onto which volume scatter node was added, but still, even ...
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0answers
105 views

2.83 Volumetric Light flickers when camera moves

Volumetric light always flickers in Eevee when the camera is moving. There's also DOF, but it flickers even when it's off. In this particular video it does not seem that horrible of an issue, but in ...
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1answer
32 views

Eevee volumetrics different in render

When I was trying to make a cloud in Blender, I began to notice a strange issue. When the cloud is rendered using Eevee in the viewport, it looks fine. But when I render it, it looks much more ...

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