Questions tagged [volumetrics]

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

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principled volume connects to volume and the object is invisible

version is3.1.2 Follow the tutorial, but don't know why the results are completely different (:з)∠)
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3 answers
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Why I can't see Godrays and How to Improve my overall scene

I'm making a scene for commercial curtains and I thought of using Godrays but for some reason it doesn't show up as I want and also I feel like something is lacking from my Scene I'll attach the basic ...
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Is using a volume absorption shader on the world incompatible with transparent background renders?

I'm using Cycles in Blender 3.1.2. I'm trying to get the light volume effect over transparency for compositing later using a 2D program. The goal is to get the window and the light beams coming ...
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VDB render in cycles has blocky artifacts

so i used this VDB on my scene, and rendered it with cycles. but somehow it has this blocky artifacts what is the cause and how do i solve it ? I rendered it with 1024 samples and denoised it with ...
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alpha weirdness with volume

I have an image plane for my water, and the alpha isn't functioning with the volume properly for some reason; it appears darker, more reflecting, or something else. with volume: without volume: here ...
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Cycles volume render renders as bounding box

hello im trying to render out a volume in cycles it was working fine in eevee but when i switch to cycles it just renders out as the entire box surrounding the volume, i used mesh to volume modifier ...
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State of NanoVDB in Blender 3.1

Is NanoVDB enabled by default? If not, how? Does one have to convert/modify a "normal" OpenVDB file in any way to let Blender know to use the NanoVDB library instead of the OpenVDB library? ...
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Alpha Volume Scatter Weirdness

I have a volume scatter box (which is fog) which has a principled volume shader on it. I then have this barrel with a png image in front of it, i enabled the alpha... however the volume scatter box is ...
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Visualizing RGB openVDB volumes

I have 3D-volumes where each voxel is associated to a RGBA color, I use the following code to convert numpy arrays (of shape [128, 128, 128, 4], RGBA) to openVDB files: ...
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How do I make stuffing/cotton balls/poly-fil [duplicate]

So I'm rendering what I want my room to look like before I remodel it and I'm gonna do a ceiling of stuffing/cotton balls/poly-fil with LED Lights underneath to get a sorta cloud look with streaks of ...
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God Rays / Light Beams not showing up in Cycles. Tried in different Scene and it worked. Whats the cause?

So I have a scene as below and I was trying all day yesterday to get a nice lighting effect and it didnt work. From disabling the hdri, playing with the sun strength, angle, spot lights etc. Today I ...
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Light Beams not visible when using volumetrics in cycles

So I am trying to get some nice lightning effects with volumetrics in my scene using a plane and a sun light in addition to my hdri. My volume is definetly visible and if I set the volume higher then ...
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1 answer
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How to get pointy cone of light in volumetric object

I'm following this short tutorial: https://www.youtube.com/watch?v=JzCkohRpRQU In it, his cone of light has a very sharp beginning of the cone, but mine starts off very round. Could this be because of ...
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Import Mantaflow VDB Cache Files into Bleder doesn´t work correctly

I made a Smoke Simulation with Mantaflow and then tried to import the vdb files from the data folder in the cache folder, but the imported vdb sequence doesn´t look the same. It looks simplistic and ...
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2 answers
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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 ...
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principled Volume is visible in the render result but not in the saved picture

I can see the volume in the render result but when I open the png image in Photos it's invisible
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Density of a volume proportional to the proximity to a surface

I apologize if I can't explain it correctly. What I am looking for is the following in Cycles: Given 2 objects, one rendered as a volume (scatter or absorption) and one as a surface, I want to change ...
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Is there an easier way to slice a VDB object?

In the solid view, VDB objects have this amazing slider view that lets you view slices along an axis of the volume. However, this doesn't work in render view. Is there a more intuitive way of doing ...
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Smoke rings with mantaflow or principled volume?

I've been trying to get a smoke ring effect like this, I've tried using a torus as an emitter set to geometry which works to create the smoke ring, but only when emitting on the Z axis. I want it blow ...
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How can I make a God/Sun ray effect in blender when also using an HDRI?

I have used the so-called "god ray" effect in many of my projects with manual lighting. But this time I have added an HDRI.So even if I add a volume scatter node or principled volume node to ...
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1 vote
1 answer
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Volumetric shader and re-create Schwartz Primitive Topology in Blender 3.1

I'm using eevee and trying to re-create Schwartz Primitive Topology found here Link but using Blender 3.1, however it's not working, any ideas why? My node setup is below. Working Node setup: My ...
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Volume Scatter problem where the volume is offset from the model

I'm working on creating a planet (rendered in Eevee) and I'm experiencing a quirk while trying to create the atmosphere around it. I haven't been able to find a related post so my apologies if this is ...
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2 votes
1 answer
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Change EEVEE volumetric sampling limits

I'm trying to minimize artifacts in EEVEE and I want to change EEVEE volumetric sample and shadow sample limits beyond the cap, is there a Python solution for this?
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1 answer
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Poor render quality with volume

I tried to make a cloud sphere based on this video tutorial, however, I keep running into the problem that the render has ring-like artifacts. I want my render to be smooth, but increasing render ...
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1 answer
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Image alpha Is black the further it is away from she camera. (Cycles)

I am trying to create a ground fog that slowly moves across the ground. To achieve that, I have created a plane with subdivision and shrinkwrap modifiers with a hair particle system and a transparent ...
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Why does my cycles volumetric lighting look so bad?

Right, been using Blender for creating stage designs for quite a few years but only recently started using volumetrics. My problem is that I've up to this point had to use Eevee for the rendering of ...
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29 views

Mapping voronoi cell local space align perpendicular to a spherical surface?

With blenders voronoi texture each cell has a local space. My goal is to use these voronoi cells to scatter a volumetric shader, like the volumetric gizmos below, with each volumetric cell instance ...
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60 views

Dune Simulation

Can this be done in Blender? I tried subdivide plane and use python. But subdivision as excepted don't go well. Then I tried material volumes, but can't get desired resolution and can't see how ...
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34 views

volume scattering light cycles 3.0; has some boxy areas

My scene has a volume scatter shader on a non rectangular shape and I am getting these unhappy blocky squares in my render. See attached screen snippet. As you can see, some of the light looks great-...
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Animate Volume python

Can I manipulate volumes from python or create something like heightfield in Houdini. or Maybe material volume data. I want to access volume information and be able to animate it. I want to recreate ...
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1 vote
1 answer
31 views

volume density stronger to the edges

I am trying to to get a denser volume to the edges, than in the center of the object. I tried to drive the density through a fresnel, but this does not seem to work, does anyone have other suggestions?...
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1 answer
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Volume absorption doesn't work

I'm trying to make coffee cup, following BlenderGuru tutorial, but when I add volume absorption, it only work on top of mesh
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Volumetric object where the volume gets less dense towards the edges?

I have 2 spheres. 1, the outer one isn't selected while sphere 2 (the inner one) is selected. I want to make sphere 1 a volumetric object surrounding sphere 2 where the volume gets less dense towards ...
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3 votes
1 answer
38 views

How do I render different things in different render layers?

I have an earth model with an atmosphere model around it. I want to render the earth in one render layer, and the atmosphere on another render layer. How do I set the atmosphere to render in the ...
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7 votes
1 answer
202 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 ...
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8 votes
2 answers
1k 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 ...
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0 answers
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Object with volume absorption, in an environment with volume absorption

I have tried different approaches, some of which work, but feel more like workarounds than proper solutions. Let's say: I have an environment (in the most simple case, the world, alternatively an ...
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1 answer
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How to keep instances within the volume

I'm trying to create cookie chips within a chocolate with geometry nodes. I've managed to create the instances but within the surface. And all the references/tutorials (even blender description of the ...
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1 answer
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No Bloom with Principled Volume

I'm trying to achieve a nice bloom around my lighting with some principled volume fog but I cannot seem to achieve the result I'm looking for (rendering Cycles). Is there something I am doing ...
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1 vote
0 answers
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Weird Patchy Cycles Render when I use Principal Volume & Light

I used a spotlight to make a projector based on a tutorial I used (https://www.youtube.com/watch?v=adahnQCqmw0) and I keep getting these patchy results even when I render to 1000 levels in Cycles. I'...
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1 vote
1 answer
61 views

Principled volume showing up in viewport, but not cycles render

Am I doing something wrong? (I'm not great with shaders lol so any advice would be very helpful)
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Fog wont appear

Im new to blender and I tried adding fog to a scene using Eevee. The way I did it was by adding a cube to the scene and in the shading I did even though I increase or decrease density, nothing ...
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1 answer
55 views

Why isn't my principled volume registering texture inputs - Eevee

So I have been wanting to add animated ground fog to my scene in eevee in Blender 3.0, however I have come across this issue where any texture I add to my Principled volume's density input or emission ...
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Newbie adapt Cycles rocket thrust flame to EEVEE

I've been following this tutorial While i was able to adapt it to blender 2.93.4 I wish to render it in EEVEE rather than Cycles like shown in the video, however plugging in emissions to volume in ...
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Godrays through tiny cracks

I want to have godrays going through some tiny cracks in a shattered object. It is a cube that is hollow inside (through a solidify modifier) and then has a cell fracture applied to it with the ...
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VBD inside Volume-Scatter Object produces blurry/blocky Artifacts

System Information Operating system: Windows 10 Graphics card: 2070 Super Im using Blender 3.0 und came across some strange issue. As described in the title when i put a (smoke) VBD (downloaded from ...
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Is it possible to voxelize a volumetric shader using geometry nodes, or create volumes in geometry nodes?

Using math or signed distance fields, I can create 3D shapes and 3D Fractals using volumes in shaders. This is convenient and all, but the detail and style is limited, its also very slow, and it ...
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Why is there this ringed artifact in the render?

This is in Cycles, sample count doesn't seem to affect anything. I have 2 volume cubes, the rings only appear when both are enabled. It only appears in the render, not the viewport. There is nothing ...
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Volume Scatter leaves black fringe

quite the blender noob here: I am trying to achieve a fog effect with volume scatter in blender 3.0, because principled volume supposedly doesnt work in blender 3.0. below you can see the problem: ...
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Glossy Material doesn't reflect light beam pointing away from camera (Cycles)

I want a laser beam and its reflection to be scattered through a volume, so I wondered if it is possible to have Blender calculate the light that is pointing away from the camera, as shown in the ...
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