Questions tagged [volumetrics]
Questions about rendering with volumes (smoke, fog, etc.). Use this tag for both Blender Internal and Cycles.
602
questions
0
votes
0
answers
7
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 ...
0
votes
0
answers
77
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 ...
- 373
2
votes
1
answer
22
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 ...
0
votes
1
answer
59
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 ...
0
votes
1
answer
59
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 ...
- 1
0
votes
1
answer
21
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 ...
0
votes
1
answer
19
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.
...
- 11
0
votes
0
answers
34
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 ...
1
vote
0
answers
42
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, ...
- 11
0
votes
0
answers
76
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 ...
- 47
0
votes
0
answers
45
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 ...
- 41
0
votes
0
answers
22
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 ...
- 101
0
votes
1
answer
47
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 ...
- 1
0
votes
0
answers
26
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, ...
- 1,103
2
votes
0
answers
21
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, ...
- 51
0
votes
1
answer
103
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 ...
- 31
0
votes
0
answers
15
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.
- 1
0
votes
1
answer
118
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 ...
- 75
0
votes
0
answers
18
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 ...
- 1
0
votes
0
answers
23
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 ...
- 55
0
votes
0
answers
27
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 ...
0
votes
0
answers
17
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 ...
- 1,025
0
votes
0
answers
27
views
Volumetrics + Composition creates lots of noise in cycles
Why does my render look like this?
What setting do I need to increase to solve this?
This started happening when I added the volumetrics. Here is my nodemap:
And here are my render settings:
This is ...
0
votes
0
answers
297
views
Regarding Blender's "Mesh to Volume" geometry node, is there a workaround for using density as an input like the volume cube?
For reference, I'm looking for an effect similar to Lee Griggs's work using Arnold but through blender's geometry node volume displacement tools. A good example would be their piece bifrost tim:
https:...
- 23
0
votes
1
answer
21
views
Viewport and renderview images vastly different to saved image
I am working on a nebula image using volumetrics and evee. I am following a tutorial and everything works fine until I save the image sequence. The images are almost invisible compared to the viewport ...
- 603
0
votes
0
answers
35
views
Is it possible to control the visibility and depth of objects inside the volume?
Is there a way to make the cube inside a foggy volume appear as if there is no volume at all?
That is, it did not lose its contrast and was displayed normally and not vaguely.
Is it possible to ...
- 1
0
votes
0
answers
21
views
How do I use bssrdf_gaussian and bssrdf_cubic in OSL?
I'm repeatedly getting errors reported that these functions are not defined, but they are explicitly mentioned here in the documentation. Everything else on this page has worked so far, including <...
- 1,190
0
votes
0
answers
56
views
Overlapping vdb artifacts don't appear in cycles viewport but do appear in cycles render v3.6 LTS
I use blender for scientific visualization. Lately I've been leveraging openvdb to load and render voxel models as volumes. Some of my workflows involve overlapping volumes, and there have been well-...
1
vote
0
answers
196
views
SOLVED: Alpha channel not rendering properly
UPDATE: This is solved! Check the comments for the solution.
What I see in my render view is not what I am getting on my exported image.
Attached are three screenshots:
This is what I see in my ...
- 11
0
votes
0
answers
32
views
Volumetric shading on a mesh
The gif below is a breakdown of the volumetric hair shading of the titular character from the Dreamworks film Ruby Gillman: Teenage Kraken. I'm wondering how I can apply volumetric shading and a ...
- 89
0
votes
0
answers
15
views
How do I make procedural volumetric planetary clouds? [duplicate]
So, I’m making a procedurally generated planet in blender, and I need a way to make realistic looking volumetric clouds that look good from both space, and the surface. Even if I use a sphere around ...
0
votes
0
answers
57
views
eevee principled volume shape is off
I was tring to use principled volume to make dust that flow along the ground surface which is displaced to a certain amount. My first try is to distort the volume box mesh by shrinkwrap a plane to the ...
- 43
1
vote
2
answers
762
views
How to make cumulonimbus clouds?
I would like to make one as a volumetric object, but I have no idea how. Any suggestions? Best would be to use VDBs that are already done, but I haven't found a single one online, paid or free.
Below ...
- 1,419
1
vote
0
answers
103
views
How to make glossy material reflect spotlights into volume?
I want to be able to create a nice spotlight effect with a spotlight being shone on a mirror or some sort, and be able to see these reflections through a volume scatter, I've tried a few times to get ...
- 146
0
votes
0
answers
34
views
Achieving such realistic looking secondary volumes that look like realistic clouds with sharp edges
I was able to figure out that there are a two kinds of volume cubes here , one is covering the whole terrain and smaller ones creating those clouds.
How do I achieve such realistic volumes which blend ...
0
votes
1
answer
41
views
Why do volumes appear more dense when sliced with a bunch of transparent planes?
I encountered a very weird behavior with my procedural clouds. For context, I also used VDB clouds, which were full of artifacts where they are intersecting with each other. I found a hacky workaround ...
- 1,419
0
votes
0
answers
9
views
Transparent background and volume emission (cycles) [duplicate]
I am new to Blender and am having troubles rendering a Sun.
The layers I created as volume emissions for the atmosphere are not exporting properly on a transparent background as PNG.
On the render ...
- 1
0
votes
0
answers
27
views
Is it possible to have a light in a scene not affect a volume in Eevee?
I have a scene with a volume encapsulating the scene, to get some nice atmosphere and light scatter. However, I now want to add a spotlight to hilight an object, but I dont want that spotlight ...
- 239
0
votes
0
answers
13
views
Large Object Volumetric Banding Isssues
I have a scene with an enclosing largeish object with a volume applied with this node setup.
All I've changed here is the density.
What I can't seem to figure out is the banding issue, at least I ...
- 211
2
votes
1
answer
408
views
Why is blender stuck at computing volume mesh?
I have a pretty big and complex scene and now at the end, I needed some smoke sims and that’s what I did. I tweaked them, baked them, etc. I can see them when I use the rendered viewport. But now, ...
- 157
0
votes
1
answer
132
views
How can I apply volume cube node with texture effect to different kinds of geometry?
I found this volume cube node is helpful with making the sponge-like structure. However, I can only apply this effect on the cube. How can I apply this effect to others geometry, like cylinder?
0
votes
0
answers
35
views
How to blow fog in one direction? (rocket engine ignition)
(sorry for the unclear title, I had no idea what to call it)
I'm making an animation of a rocket engine ignition in a vacuum. I would like to do the same as in this video:
https://youtu.be/xMr_AGJprrg
...
- 147
1
vote
0
answers
52
views
Eevee linear / cubic volume interpolation
I am trying to render VDB-clouds. In cycles I have the option to chose the interpolation in the material properties. With linear interpolation the clouds look jagged/blocky. With cubic they look ...
- 11
1
vote
1
answer
32
views
Want to control fog setting for each individual lights sources in the Scenes for Cycles Renderer
I am using Blender 3.5.1, and I am not able to find volume setting for each light.
For example I need the Fog for Lamp and for other lights I don't need,
So is there any option to turn off / on volume ...
- 33
0
votes
0
answers
31
views
How can I fix these artifacts that appear when I set indirect only to my emissive smoke?
TL;DR: Artifacts appear when smoke with emission set to indirect only.
I have this scene which contains a smoke with emission.
When I render the scene with indirect only for the smoke these weird ...
- 1
1
vote
0
answers
52
views
How can I generate occlusion effects in meshes
I have meshes representing complicated fields of views of observers (positioned at local origin of the mesh). I would like to calculate new meshes that take into account occlusions inside the fields ...
- 238
0
votes
1
answer
260
views
Volumetrics render different in viewport vs final render
When using volume scatter on a massive cube, with an hdr image for lighting, I’m getting wildly different renders between what I see in my viewport vs what I get in my final render.
I thought at ...
- 101
1
vote
0
answers
31
views
I am having problems with VDB volumes that intersect, it just leaves random patches that look like the volumes aren't there
So I did a smoke simulation in Houdini, exported i and imported it into blend and I need to place it six times around 1 point but for some reason the places the volumes intesect have random patches ...
0
votes
0
answers
39
views
Weird Volumetric Lighting Issue with Emissive Texture
I'm using a couple of emissive textures to light a scene, and I added a cube (volume scatter) for volumetrics. Before scaling everything up, the volumetrics looked fine. However, now I'm getting this ...
- 1
0
votes
1
answer
191
views
How to Apply Transforms to a VDB volume object
I have imported a VDB file and it's orientation is wrong, but when I try to apply the location and rotation after orienting it in right direction, it doesn't work
It gives error - ...
- 451