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Questions tagged [volumetrics]

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

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Fire VDB is coming from everywhere!

It's quite obvious in the image, that the fire is supposed to be only in the middle of the render, but it's spreading out everywhere, the fire behind is not supposed to be there. I have no idea. It's ...
ahkai's user avatar
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12 views

Faded Bar on Frame-top in Camera View

I made a new scene. Utilizing a volumetric mesh, transparent node set up (with ambient occlusion nodes), and 3D scans. But in camera, you can see a faint bar going across the top. Mainly seen in the ...
Praxis Visuals's user avatar
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1 answer
13 views

How can I achieve a similar indirect illumination like in the cassini image from saturn

On the left you can see my version in Blender, on the right is the original image taken by Cassini from Saturn against the backdrop of the sun. On the original image the indirect illumination from the ...
SolomonTheScapegoat's user avatar
1 vote
1 answer
44 views

How to have object A attribute influence object B shader parameters

so TL;DR is: How to have obj A geo-node attribute influence obj B's shader parameters? I have two objects A and B. A is a curve circle and uses geo-nodes to store its radius as a named attribute. This ...
VentZer0's user avatar
1 vote
0 answers
16 views

Volume emission and transparent background?

I have a problem with emission volume and transparent background here is the file https://filebin.net/pm3hmhi3gvtdzxqs I have a cube with emission volume and a transparent background but when I render ...
MementoMori's user avatar
2 votes
1 answer
82 views

Volume absorption density per color channel

I have a volume with a Volume Absorption node, and the density is based on the distance to the camera (the further away, the denser). But I would like to have a ...
Apo's user avatar
  • 33
1 vote
1 answer
26 views

Principled volume does not work in eevee

I used a principled volume on a cube for testing and the cube just turns invisible. I’ve switched to cycles and it does show the volume. So I played with the volumetric settings and it shows a tiny ...
Bludus's user avatar
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24 views

How do I avoid banding in volumes that appear only on every other frame?

I am rendering out a sequence and have noticed that there is a circular banding happening within a volume, but only on every other frame. This happens both on render output and in rendered view within ...
Blake Audette's user avatar
0 votes
2 answers
45 views

Create volume cube around object with equal padding from bounding box center?

I want to create a volume cube around an object with equal padding from the center of the bounding box of the object. Ideally, this would be a single value input (ie. "padding amount"). The ...
Zero Dean's user avatar
  • 159
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1 answer
39 views

Issues with volumetric fog being too thick

I tried my best to make a fog scene, but when I added volumetric fog it went just a single color. I can't see any objects, but when I zoom in I can barely see the objects. Scene: Shader:
maria's user avatar
  • 3
1 vote
1 answer
48 views

Volume type to gltf2.0 issue

I'm relatively new to Blender and currently, I'm working on creating medical imaging displays on a website using three.js. I've managed to import DICOM files using the MedBlend library (https://github....
Young Wang's user avatar
1 vote
0 answers
24 views

Update volume phase function

I have a Blender environment setup with a Mix Shader combining Volume Absorption and ...
Apo's user avatar
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2 votes
1 answer
80 views

Blender 4.01. Coloured volumetric light through coloured glass

I want to achieve a result like this. As said in the title I want to have my volumetrics coloured like the glass material which they pass through. I've seen some old threads, but for some reason it ...
Matthieu O.'s user avatar
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0 answers
18 views

Why Does Principle Volume Doesnt produce darker shades of color?

EVen Smoke Simulation keeps appearing darker shade but i gave the exact hex code of the sand . But tornado and smoke sim appears to be darker shade
Yukthy Parthy's user avatar
1 vote
3 answers
38 views

how do i set up a material so that im able to set up the falloff of an volumetric object from its surface?

how do i set up a material so that im able to set up the falloff of an volumetric object from its surface? i basically want the density at the center of the object to be normal while i can make the ...
spatialed's user avatar
-1 votes
1 answer
48 views

How can I reduce a 20h render?

I have followed a tutorial by Alaskan FX for a photorealistic Earth. This scene uses a 43k Clouds texture and 21k color map. My laptop is the Gigabyte g5 md with a RTX 3050 Ti 4gb and 16gb ram + ...
2sa2's user avatar
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0 answers
17 views

World Shader Principled Volume Node Issues

I'm attempting to set up an underwater scene in Cycles by using the world shaders. My node setup isn't very complicated, it's just a principled volume node with the usual background node.The problem ...
Robin Sebbag's user avatar
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20 views

Is it better to have one large VDB or a bunch of small ones?

While making a cloudscape I was wondering which would be the better way to go about it. Is better to have 1 large VDB with a bunch of dense spots for clouds but mostly empty space, or an individual ...
Hank The Tank's user avatar
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0 answers
54 views

How works Principled Volume?

I created a Geometry Nodes (GN) node tree that simulates the smoke trail from a missile. The simulation of fire from the nozzle is done with emission, which is limited by a gradient. Its position is ...
Dmitriy's user avatar
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0 votes
1 answer
44 views

Volume absorption with boolean difference, when smooth shading the cutter?

I'm using a Boolean Difference modifier to cut a cube and a sphere out of a cube. Then, I've assigned the same material to all objects, and I've removed Surface, and added Volume Absorption: The ...
Hugh Perkins's user avatar
3 votes
2 answers
451 views

How do I emit light from within an object using a point light (Chinese Lantern)

I scaled up an Icosphere and want to create the effect of a very big Chinese lantern, but irrespective of the material. I can't seem to get the light to emit from within the object. It just keeps ...
anitahanns's user avatar
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0 answers
15 views

Possible to have world node only affect one object? Problem with lightning Volume Absorption

Is it possible to have a world node that only affects an object with volume absorption? I have a situation where I want to be able to control the lighting specifically for the liquid. I have tried ...
N03's user avatar
  • 369
1 vote
2 answers
70 views

Fog reveals alpha from png image

I am using a tree image (png) with fog. I noticed that the fog is highlighting the alpha from the png image. I am using the True Sky addon for the fog. How can I remove the alpha highlighting? I'm ...
Tobi's user avatar
  • 23
3 votes
0 answers
34 views

Is it possible to create a volume scatter Cycles material with "real" scattering?

I might not understand the Volume Scatter material properly... A real "milky" glass (like diffuse volumetric plexiglas) would scatter light in any direction. If you put a printed paper with ...
Steve's user avatar
  • 460
0 votes
1 answer
121 views

Numpy array to openvdb conversion returns a shuffled volume

I have a 3d numpy array containing results from a simulation which I want to render using Blender. When visualized using napari I get the expected result: Using ...
Tom Aubier's user avatar
0 votes
1 answer
73 views

How I can apply noise texture shape animation on a geometry?

i'm a begginer with geometry nodes. I created this simple noise texture animation with geometry nodes. I was trying to put in on a desired shape. I didn't found the solution. I was trying to create ...
Beata Izabela Zając's user avatar
1 vote
1 answer
171 views

How to include smoke/fog/volume into mist pass

I'm using mist in this node for compositing And have run into the problem that a smoke domain using a volume shader is rendered as white Is there any way to fix that? Or maybe getting the same mist ...
Evgeniy Pupkin's user avatar
0 votes
0 answers
55 views

Why is my principled volume shader not filling the object it’s applied to?

I have a duplicate of my walls scaled out along normals and set to display as wire, then a principled volume shader applied. But unlike in the tutorial I’m following, the volume doesn’t fill the space....
Zach Sheram's user avatar
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0 answers
10 views

Question on balancing different light sources- God rays

I am making this google logo ball of sorts. I want it to have volumetric lighting emphasising the geometry like in the picture. However I don´t want it to have too much light hitting the floor. I know ...
Gus_Ex_Machina's user avatar
0 votes
0 answers
135 views

Spot Light size in principled volume Bug in 4.0

I guess I find a bug, there is this strange thing when you combine principled volume with spotlight or point light. That you see a hard edge of the light. Its gone when you make a higher radius but ...
3D bob's user avatar
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2 votes
1 answer
195 views

import VDB file and start the animation at a certain frame in your scene

Hi I have created a VDB file explosion and it looks great. I Have imported it into another project and it all works. This is using Blender 3.6 However I would like to change the frame that it appears ...
jason millington's user avatar
0 votes
1 answer
257 views

How can I improve my PSX/PS1 fog?

Blender: 3.62 Art Style: PS1/PSX Game: Ecco The Dolphin: Defender Of The Future I'm using the Principled Volume Shader on my World Node to achieve a colored fog effect. It's ok but i have 2 ...
wild goose's user avatar
0 votes
1 answer
94 views

Render not maintaining transparency when using volumetric lighting (Cycles)

I have been working on a pre-rendered game for quite some time, and wanted to add an object to the game with a transparent background but still having and being affected by volumetric fog to match up ...
sypher's user avatar
  • 1
1 vote
1 answer
71 views

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 ...
Troy McClellan's user avatar
0 votes
1 answer
22 views

Light not affecting volumetric cube, but only in specific project file?

I have a project where I am trying to shine a light through a volumetric cube. Everything was working as expected until I unknowingly changed some setting which made it start behaving differently. ...
zsergeant's user avatar
0 votes
0 answers
61 views

SDF Volumetric Morphing Noise in Density Problem

I've been following the tutorial you can find below: https://www.youtube.com/watch?v=9ubfb2K6mL0 Currently I am experiencing some sort of noise/artifacting problem near bounding boxes where I cannot ...
user avatar
1 vote
0 answers
67 views

Why does Cycles volume rendering (absorption) seem to be tied to the objects/volume size?

So I have the same volume absorption material applied to cubes of different sizes. But the density seems to change based on the size of those objects, see attached image: A closeup of the material, ...
Christian F.'s user avatar
0 votes
0 answers
125 views

How to obtain a sort of "spherical fall-off" displacement?

I created two node trees that extrude a profile (a mesh made up of a few vertices, transformed into a curve, and to which a fillet is then applied to round the corners). They extrude it in such a way ...
crucchi's user avatar
  • 69
0 votes
0 answers
85 views

I want to use the color of one volume to color a mesh

Is there a way to use the color of a volume object to shade it? I haven't found anything online or when checking shaders and geo-nodes. Does anyone have an idea to solve this? I didn't understand on ...
Hendrik's user avatar
  • 41
0 votes
0 answers
39 views

Controlling the point opacity value & threshold in volumetrics VDB

I'm trying to duplicate 3D density plots from Mathematica into Blender. Within Mathematica, You can control the opacity threshold of rendered points - points with value below and above the threshold ...
Lechuu's user avatar
  • 101
0 votes
1 answer
295 views

VBD volumes looks transparent (EEVEE)

So far I have not found anwer, VBD volumes looks of course good on Cycles, but i wanna use them for simple stuff on EEVEE, but, most of the times, they barely work or are visible on render, i moved ...
Beltway's user avatar
  • 11
0 votes
0 answers
73 views

How to select a material or object using the cryptomate node if it is a volume

I have a cube in the scene that I have assigned a volumetric material to. Why can't I select it using the cryptomate node when composing a scene? All materials and objects in the scene are displayed, ...
arachnoden's user avatar
  • 1,361
2 votes
0 answers
45 views

Is there a way to change the volume scatter colour while only having a red light

Volume in blender is a brilliant way to give depth to a scene and can give gorgious god rays, but for the scene im working on i want a different colour fog around the light then the light itself, ...
Mel Meanley's user avatar
0 votes
1 answer
222 views

Is it possible to ‘blur attribute’ for volume cube density?

I’m using a combination of techniques within geometry nodes such as Ray casting, geometry proximity, to affect the density of a volume cube node. I’ve defined my density attribute, and I’d like to ...
btn_237's user avatar
  • 31
0 votes
0 answers
16 views

Volume nodes not working for me on a macbook pro and EEVEE

I can't get anything in volume node output whatever I do it's still like it's just not connected to anything.
durk's user avatar
  • 1
0 votes
1 answer
505 views

Density field for volumes in geometry nodes

The "points to volume" etc in Geometry Nodes has a density input. This value is a single value, rather than a field. Is it even possible to store and use a regional density ? I've tried ...
Rico Holmes's user avatar
0 votes
0 answers
20 views

how to render scene in blender with layer and volumetric atmosphere

I have a problem with rendering a scene correctly using layers. When I render it as a whole everything is fine. When I use layers I have a problem with volumetric atmosphere which obscures everything ...
Alek Pol's user avatar
0 votes
0 answers
63 views

Grease pencil bleeds through objects when volumetric is on in cycles

When grease pencil is used in a scene where volumetrics is on, some pixels of it bleed through the objects in front of it after the image has been rendered using cycles (even when Z pass is on) as ...
guest's user avatar
  • 55
0 votes
0 answers
56 views

Horizontal lines showing up in volumetrics

These horizontal lines keep appearing in my render(doesnt appear in viewport). Incresing samples or volume bounces doesnt seem to fix it, Decreaing step rate doesnt aswell. Currently rendering in CUDA ...
Abhay Rajeev's user avatar
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0 answers
19 views

Bright artifact where emissive flames intersect VDB. Can it be fixed?

I am animating a landing spacecraft with animated flames (procedural material) and an imported volumetric VDB for animating dust stirred up by the thrust. Issue: A bright artifact is created where the ...
WilburPost's user avatar
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