Questions tagged [volumetrics]
Questions about rendering with volumes (smoke, fog, etc.). Use this tag for both Blender Internal and Cycles.
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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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422
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Volume rendering an image stack in Blender Game Engine
I'm trying to create an interactive scientific visualization tool using the Blender Game Engine (BGE). One of the things I want to include is a volumetric rendering of an image stack. An image stack ...
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How can I create custom texture coordinates for a volume?
My ultimate goal: I’d like to create procedural cirrus clouds (long, thin, feathery high altitude clouds), ideally shaped fairly directly, e.g. with a curve. There are some very good procedural cloud ...
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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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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 ...
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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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Volumetrics - Different results GPU vs CPU
Hey fellow Blendy people,
I'm running some benchmark comparisons between various render engines involving a lot of small, simple scenes.
Anyway, on my test scene for volumetrics, I'm noticing a ...
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Volume scattering is limited by the fire simulation domain
I have a scene with fire and smoke simulation, adaptive domain enabled .
Fire is placed inside a cube with the volume scatter shader .
But the light scattering around the fire appears to be limited ...
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Cycles volumetrics: artifacts on edges
I'm creating cloud in Blender/Cycles. While following this tutorial I came across artifacts:. The problem is marked on render (the biggest visible artifact) and seems to appear in areas where faces ...
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Lighting a volume with a bi-color point light (2)
This question is a following of this one
I would like to light the center of a cylindric volume with a gradient light White -> Red -> Blue radially from the center to the border.
I made a test of ...
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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 ...
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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, ...
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Set specific values for ray visibility on lights
In other software (houdini, 3ds max) there is a way to set lights to have specific Ray multiplier values. For example having diffuse at 1.0 but volume scatter at 15.0. This would make its volume ...
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Grease pencil is showing through objects when I turn on volumetrics
This is with volumetrics on, you can see little pixels of the grease pencil bleeding through objects in the foreground.
This is with volumetrics off, here you can see the grease pencil is displaying ...
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How can I load OpenVDB files with correct scaling and translation
Dear Blender community,
I have been trying to use Blender to visualize molecules and volumetric data from molecular dynamics simulation. I managed to save my data in OpenVDB format using the pyopenvdb ...
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How do I taper the density of volume edges?
I'm creating a smoke cloud just run by the displace modifier, and want a simple volume texture, but would like to have softer edges all around the model.
I have tried gradient textures (quadratic ...
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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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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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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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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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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 ...
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Can I define a coordinate system based on a mesh, as generated coordinates are based on a bounding box?
I am making a procedural cloud based on CGMatter's which takes the shape of the mesh assigned the cloud material, with the added ability to 'shrink' the initial (pre-distortion) volume box so the ...
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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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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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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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Is there any way to use Cycles for 3D data visualization?
I have a CSV file containing coordinates for stars in a galaxy and I want to plot them through volumetric data inside a cube. I have tried the voxel data type in blender 2.79 with blender render (it ...
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Is there any support in Cycle or Eevee for volumetric data rendering on a non-uniform grid?
I have some volumetric data (on a non-uniform grid) in files and I would like to be able to use blender to make volume rendering of them.
The difficulty here is that the data is actually sampled on ...
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Volumetric light without fog
I'm using blender 2.8.
I was wondering is there any way to create volumetric light without fog (or just a little bit) ? There are some tutorials on Youtube but almost all of them are creating ...
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Volumetrics don't show through glass
Is it some Eevee limitation or am I doing something wrong ? Here are my SSR and material parameters:
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(2.81 Evee) Volumetric spotlight shows through solid object
I'm trying to add "real" spotlights to my scene, as in stage lighting. Naturally I want spotlight-looking objects present. Problem is, when I place the light inside the object, it still shows through. ...
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Is there a way to bake volume density information which is generated from an OSL script?
I am trying to generate volume density information (e.g. a mandelbulb) from an Open Shader Language script in cycles. This however only works when rendering with a CPU. My GPU is much faster but doesn'...
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how to make edge fade away with principled volume shader
how can i make edge on the atmosphere fade onto nothingness, right now it is to noticeable where it ends. I am using only principled volume shader and the density is at 0.0003. Changing density does ...
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Black spots on Z-Buffer (Depth Pass)
To begin, I'm using a MacBook Air 13" early 2005 model. I cannot render high-quality images with ease. I can only render on the iMacs my school has allowed me to use. If samples/quality is a part of ...
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Cycles & Blender Render for God Beams / Crepuscular Rays / Sun Beams
I'm having trouble getting the actual beam of light to show in the render of my image. What I want to do is create an image that looks like this:
However, In blender render I am unable to get the ...
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638
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Cycles Volume: Dynamic Step Size?
I've been thinking about Cycles' Volume Scatter, and how AMAZINGLY SLOW rendering volumes are. Especially so if you have both a very large, very far away volume (like clouds)in your scene and a very ...
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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, ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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How to I get this type of mesh in Blender?
I created this mesh in Cinema 4d, making use of Shader field and volume mesher:
I am trying to recreate this type of mesh "(liquid)" in Blender. I first try by using geometry nodes, by ...
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Volumetric / Atmosphere Cutoff Problem
I am rendering a landscape scene with realistic scale values (about 6000 meters) in cycles.
I need a very fine atmospheric effect, but below a certain density value the volumetric shader abruptly cuts ...
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Why Is My Volume Emission So Blocky?
Can someone explain to me what is happening here and how to get around it? I have a volume object (cloud) that I want to give a soft glow. However the glow is very blocky, yet the mesh that the ...
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I'm looking to make a volumetric material only show up when Light hits it
I've done this with a Principled BSDF to make a light cycle on my earth scene, and I want to do the same with the volumetric atmosphere, but it doesn't seem to work with volume the same way a material ...
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Liquid material shading problem
I am beginner with blender and I'm currently trying to create some liquid (coffee for example) inside a cup. The cup is not a problem, shading of the liquid is.
I've tried to follow few tutorials on ...
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Principled Volume not working
As a beginner I am trying to follow a tutorial and learn by doing.
My principle Volume doesnt work the way it is inteded to. Everything above 0 density makes everything appear white. I have searched ...
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Why does my volumetric atmosphere not have an orange sunset region?
So this is the effect I'm looking for:
This orange glow in an atmosphere, right where the shadowy and the light side meet. However, my material (which should be pretty physically accurate as far as I ...
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Is is possible to use grid volume as 3D texture?
I have been able to convert and import 3D MRI brain image in Blender 3.2.2 using OpenVDB format. The result is a volume grid. Now, I would like to be able to use this volume grid (in fixed world ...
