Questions tagged [volumetrics]
Questions about rendering with volumes (smoke, fog, etc.). Use this tag for both Blender Internal and Cycles.
437
questions
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19 views
volume shader inside of a glass material
I am trying to create a scene of nebula trapped in a glass cube,I have sucessfully created nebula by using principled volume,however whenever I try to put a transsimisive cube around it,cycles ...
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14 views
Problem with volumetric lighting
I'm trying to replicate a problem I'm having in a scene I'm working on, simpler but the same issue.
I have a scooter wheel with leds inside the wheel and a basic volumetric cube surrounding it.
If I ...
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0answers
24 views
Adding Volumetic to a scene changes the alpha transparency around my vegetation
I've imported some vegetation from the "tree vegetation addon"
Here's what it looks like
When I add a volumetric cube (not to the world), to add some fog, It messes up the transparency ...
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16 views
how do i keep dense volumetric effects staying sharp, mine keep going fuzzy when i change unrelated parameters
i have a dense volumetric scatter (happens with absorption too) shader with very fine details that i want to keep sharp, it stays sharp when i connect the nodes but it goes fuzzy and different when ...
2
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0answers
27 views
Why do the clouds look blocky?
I imported vdb clouds into Blender and noticed in the viewport they looked very blocky. So I rendered it out and it looks like this. I tried changing the light path and volume settings but nothing ...
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12 views
Atmospheric falloff for volumetric materials?
I have a scene with volumetric clouds, and would like to have atmospheric falloff on them using the mist pass, however, as you'll see in this simplified scene, that didn't work.
Here's the scene. As ...
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21 views
volumetrics not visible through glass / refraction
Cycles. I have a cube with a volumetric scattering shader in a room with ceiling lights. the volumetrics look good inside, but when viewed through a glass pane (principled bsdf with Transmission or ...
1
vote
1answer
32 views
Volumetrics not rendering/previewing in Cycles but working fine in Eevee [duplicate]
Hello Blender Stack Exchange! I seem to have a problem where my fog node setup doesn't display in the scene using Cycles engine (not working in 3D viewport nor in the final rendered image) but ...
2
votes
1answer
131 views
Cycles: Strange effect on glowing object
I have the arrow with glowing shader. Rendered by cycles it looks like this:
You can see the light rectangles, I don't want there.
Geometry of the arrow looks fine:
My shader:
The ...
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0answers
28 views
Look up vertex' attributes, given a 3D texture position (in shader nodes)
Is there a way to access the (possibly interpolated) vertex attribute of the closest vertices in a shader node, given a 3D position? In a CPU-based program, I'd use a k-d tree and search for the ...
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47 views
Stoll no solution for noisy volume in cycles?
I've created volumetric clouds and tried to get them to have no or at lest usable noise, NO WAY!!!
I tried everything for 2 straight days now and I#m about to go up the walls....
I tried follow ...
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26 views
Cycles fog not working when rendered
I have tried following a few tutorials to get fog using nodes when rendering with cycles but they all turn out with the same result. This is a screenshot of the node setup for the fog.
When I go to ...
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19 views
specific volume should not block light
is it possible to set a certain volume so that it does not block the light of the world wallpaper in Cycles. It is a cloud that is overhead, but not supposed to block the light from above. Yes sounds ...
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1answer
19 views
Manipulating a volume cube via it's mesh -- Volume remains unaffected
Attempting to manipulate a volume cube by manipulating the mesh.
I've subdived / pinned the top face of the mesh to an ocean sim with a shrinkwrap (trying to simulate an underwater volume so I can pan ...
3
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0answers
27 views
Volumetric Project Image from Center
I've got a volume being generated from an image texture, I just need it to come from the center instead up straight up and down. Here's what I have so far. I tried using UV for the texture coords, but ...
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votes
1answer
52 views
Multiple smoke materials which have intersecting domain
I have two objects which are smoke generators and their domains are unfortunately overlapping. Now, when I apply one material to one smoke, it gets applied to the other smoke as well.
I have baked ...
2
votes
1answer
109 views
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?
0
votes
1answer
71 views
Why is my volumetric lighting shown in the viewport but not in the render?
I am working on Blender 2.93.0, using EVEE as a render engine. My friend (and all the tutorials I've seen) did the exact same thing than I did and has no problem seeing the volumetric lights rendered. ...
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29 views
How to fix background issue with cycles fog?
So, I used a cube to create the volumetric fog with volume scatter. The problem is that in the camera, the background is black instead of matching the fog. Is there any way to fix this? Is there ...
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21 views
Get evaluated Node tree values from cycles/eevee
I know that shader nodes in blender are just visual representation and which is compiled into svm stacks and then evaluated.
https://blenderartists.org/t/node-tree-evaluation/1205276
What I have in my ...
1
vote
1answer
73 views
How to reproduce this kind of bright effect animate on Blender?
I need help to reproduce this kind of bright effect on Blender, but I want to animate it as well, the animation could be it just turning around in circle.
What do I need to search about to recreate ...
1
vote
1answer
29 views
Link volume to collection
Helly everyone,
How can I correctly link a volume object to a collection?
When I'm creating a volume like this:
vol = bpy.data.volumes.new('Thing')
I wanted to ...
2
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0answers
33 views
How to get each voxel's density of Volume object from Python code
First of all, my purpose is exporting/generating raw volume data from triangle mesh. Latest blender (2.93) has "Mesh To Volume" modifier so I tried it.
When I created Volume with "Mesh ...
7
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0answers
47 views
Is there any way to convert generated volumetric shader into the mesh?
Now that we've got Volume to Mesh modifier - which is so cool - we can make meshes from the simulations, like Open VDB sequences, etc. But it seems that it doesn't work with procedurally generated ...
0
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0answers
21 views
Make a light ignore a specific volume [duplicate]
In Blender 2.93 / Cycles I have setup with 3 lights, a smoke volume and a Volumetric Scatter.
I want a light to ignore the smoke volume completely, but still shine through the volumetric scatter.
is ...
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27 views
Creating a custom glossy volume shader with reflections?
I've imported a whitewater fluid simulation made in Houdini as a VDB and have managed to render it using the Principled Volume BSDF, but without the specular/reflection highlights that whitewater ...
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44 views
Volumetric Light Cache in Blender Cycles
I have been using some pretty heavy volumetrics in Blender Cycles recently, and I am planning on making an animation with them that will most likely take ages to render at any quality level. I know ...
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0answers
33 views
Eevee Volumetric Scatter Stepping/Banding
I'm trying to make a scene for rendering a comet in Blender, as seen by spacecraft camera (i.e. realistically). The comet is done using voluminetrics, with density (and as such, reflectivity) falling ...
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41 views
Use volume float vector velocity field for motion blur in Vector pass
I simulated a pyro sim in houdini that generated three vector field (vel.x, vel.y, vel.z) and then merged them into one velocity field that I exported to a vdb.
I applied a basic shader to the volume ...
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0answers
21 views
Shading with Float Vector Volumes
Houdini 18.5 has a volume Bake sop that computes the internal scattering of emission based on the density. This is used to minimize the render times because the volume bounces can now be set lower and ...
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0answers
27 views
Sorting out eevee crash?
I have a simple cube, quite a complex node setup involving volumetric lighting, but when eevee renders, either to viewport or image, my windows manager freezes and blender crashes. The output to stdin ...
0
votes
1answer
525 views
why isn't volumetrics showing up in the viewport in cycles x? [closed]
volumetrics isn't showing up in the viewport. Can anyone try it their self to view any volumetric object in blender 3.0.0 alpha(cycles x)
1
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1answer
66 views
How do I fade a procedural clouds on the edges of a bounding box?
I have procedural clouds made following Default Cube's tutorial, the node group looks like this:
The whole thing is bounded by a large cube, and I want to fade the clouds near the edges so that they ...
0
votes
1answer
78 views
Why does my volumetric jet material appear so low res?
I'm trying to make a jet material for my rocket ship but the volume appears low res no matter how much I scale up the voxels.
I also played with the size of the object and that seemed to do nothing as ...
0
votes
1answer
105 views
Artifacts in cycles clouds and volumetric atmosphere
I am shading a planet, made up of three ico spheres, one for the planet itself, one for the clouds, and one for the atmosphere. However, the cloud layer is introducing this weird band/artifact on the ...
1
vote
1answer
58 views
eevee smoke/volume not being occluded
Been touching upon EEvEE every so often depending on what kind of image quality I'm looking for at the moment, and for the first time I am adding smoke. More specifically Glowing Smoke, as in "...
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0answers
25 views
How to stretch out animation time for a volume object
Blender volumes are great; particularly when I've got a scene (as I do right now) with a number of fluid effects going on. I can simply save them into a directory as a bunch of OpenVDB files and ...
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35 views
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26 views
Volume emission without texture when using UV coordinates
I am trying to follow this tutorial for creating laser beams in Blender, but I can't get the Noise Texture to work as the Emission strength.
When I plug the Emission output into the surface input, the ...
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0answers
15 views
Is there way to Import a VDB sequence other than the add volume (single file) operation?
I am currently running a quick script and manually changing the the file name (ie. copied the first import and copy pasted from the info window. I'd love to make a variable driven loop, but, my python ...
1
vote
1answer
39 views
Why my volume nodes not working in blender? [duplicate]
I tried experimenting with volume nodes in blender but none of then seem to work. Every node just produces a rough volume cube. This includes for every type of volume node like Principled Volume, ...
3
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0answers
58 views
How could I make a VDB volume not cast shadows?
I imported a VDB volume from Houdini into Blender 2.92 and it creates some weird shadows. How could I make it not cast any shadows? I went into Visibility > Ray Tracing but there's no Shadow ...
0
votes
1answer
96 views
Smooth Volume Rendering without Denoise in Cycles
I am trying to get my volume to render smoother without using denoising in Cycles. Testing various render settings for volume I can't seem to achieve the desired result. I figured the volumes step ...
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0answers
70 views
Rendered image saving as blank image
I rendered volume ok, but it saves as a blank image. I've tried save-as PNG and exr and also tried the output in compositor. When I render as a combined image the volume acts as expected, however ...
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0answers
41 views
Volumetrics look good in viewport but render weird
So I'm creating an underwater scene in Eevee using volumetrics for light rays. It has dark and deep colors with shadows and stuff in the viewport, but once I render it, it looks terrible. I'm pretty ...
3
votes
1answer
55 views
What 3D texture formats does OSL support?
So I'm playing with OSL right now, and have had a lot of luck in the past with texture and most of its key-value optional parameters. I've moved on to ...
0
votes
1answer
115 views
Get vdb motion blur in blender (from embergen)
I made a basic fire and smoke simulation in embergen and exported it as a vdb sequence (with the velocity data). When I put it into blender I get three velocity float values instead of one float ...
3
votes
1answer
67 views
Is it possible to add holes on volumetric clouds in eevee 2.92?
I'm trying to figure out if it's possible to add a hole/s in volumetric clouds whether it be in the mesh or some kind of texture trick, but I'm having no luck at all. I also need it to be able to be ...
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0answers
27 views
Eevee, lighting, Volumetric lighting crosses a mesh
I created two light spots with volumetric to get a beam of light with eevee in a real-scale scene. My light passes through my luster mesh despite having turned the shadow mode to none for the various ...
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vote
1answer
89 views
Cloud with volumes renders blurry
I have been struggling with this problem for a while. I am trying to create clouds using volumes. I have figured out settings that works great and the outcome is like I want it to be except it renders ...
