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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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56 views

Volume Absorption not working

I am making a cup of coffee. I created the liquid as a mesh with transmission as 0 and applied volume absorption to the mesh in order to create that darker look, however, there is no change in the ...
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23 views

(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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1answer
36 views

How to avoid transparency behind the volumetric world shader?

I have a volumetric shader set up for the World. But when I render, I see a transparent background behind where the density is too low. Is there a way to remove transparency and add a background ...
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37 views

Object ID or Material ID using Volume Scatter

If I have volume scatter in the scene both the object ID and material ID passes are affected by the volume scatter: with the volume scatter off, ID passes look fine: is there a way to get clean ID ...
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1answer
240 views

Displaying airflow inside of an engine model

Okay so basically I have a model of an engine. The purple shows where all the gas and yes gas not liquid should go. It must collide and be held in by a couple moving parts. The first thing I tried ...
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0answers
38 views

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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1answer
38 views

Confusing Volumetrics

I have a simple glass exture applied to this bulb and a circle inside with an emission texture on it w/ the strength about 30. How do I get this emission texture to fill the bulb?
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1answer
43 views

How does fire and smoke simulation work?

I'd really like to get a basic idea of what happens under the hood of the fire/smoke simulation. It doesn't have to be detailed or specific to blender, just an overview of what actually happens. ...
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0answers
17 views

how to simulate a rocket exhaust engine like shown below [duplicate]

Hell, i want to achieve this result of the rocket exhaust as shown below. this is from space x starship animation. i tried volumetrics but didnt get quite the result. a glare and a blur got me close ...
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50 views

Cycles Volumetric Lighting Render Issue (2.81)

I have a simple volumetrics setup for a nebula-esque scene. Now, the render has to loop, so I used multiple boxes with the same noise textures in them. In Eevee, this works great, but in cycles, each ...
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0answers
116 views

Atmospheric fog in Blender 2.8

I am a long time Blender user and I built some nice scenes with it. I also love the new 2.8 but ever since I was working with volumetrics in Blender I was never really happy with it. So what I want ...
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44 views

Volume Absorption density of whiskey

In fluid in a glass it mentions using a volume absorption node. Below are the settings suggested for red wine in the answer from @gandalf. Any clues re what settings, particularly density, to use ...
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0answers
15 views

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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1answer
33 views

Why is volume losing color when hidden behind glass and how do I make it keep its color?

Everything is done in Cycles. I created a very simple blue volume and gave it to a cube. I also added a principled shader to make the outside look like shiny glass. The cube on the left has only ...
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1answer
34 views

Volumetrics Tab Has no checkbox

I'm following a tutorial to make fog in my scene. I've tried adding both the principle volume and Volume scatter node to the material output. neither generates fog in the render view or lookdev. It ...
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0answers
29 views

Why i cant see volume in Render but can in preview?

Why I cant see volume in renders, just the light. Preview looks ok, but render not. Not even in EEVEE or Cycles.
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13 views

Volume Scatter form [duplicate]

I have been trying out the Volume Scatter recently but I don't get why the material doesn't want to go in the the form the mesh has, can somebody help me please?
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18 views

Volume shader results different on cpu/gpu [duplicate]

I was trying to do some tutorials and experiments for Volume shader. In a final render as well as in viewport I am getting totally different results with GPU and CPU. What is strange, when GPU (gtx ...
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1answer
26 views

rendering volume the right way?

So I am rendering some abstracts and I have never really rendered a scene with volume and I am noticing how much noise it can create. I have searched around but can't seem to find a smooth setup for ...
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1answer
18 views

Lines appear volumetrics

I am using a Volume scatter node to get a foggy effect, but I get these lines showing up on the floor.
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1answer
19 views

Light not effecting volumetrics

So I'm rendering a scene out and I'm using the world volumetrics with "volume scatter". Blender Guru has a tutorial on it. When I put a "sun" light in the scene, it doesn't effect the scene at all. ...
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0answers
11 views

Eevee - constrain fog to a sphere? [duplicate]

Ok, Im following https://www.youtube.com/watch?v=Rr8ezx1czwQ and https://www.youtube.com/watch?v=mLPuG2aE0fE exactly, and instead of a box of volume scatter I want a sphere. Putting the volume scatter ...
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18 views

Fire bleeding in eevee

I was messing around with fire in realtime with eevee, but I was cornered by this strange comportment, with the original size of the model the fire seem to bleed through the geometry, but when a scale ...
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0answers
18 views

Get smoke color from flow object Vertex Color

I have an alembic cache of an animated object with animated vertex color and I'm using this as a flow object for a smoke simulation. All that is generating smoke well, but... Does anyone know how I ...
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0answers
67 views

Issue with Volume Absorption inside Glass

first time posting here and very new to blender, Im following BlenderGuru's latest tutorial and I'm having some issues with volume absorption, this is of course not a job, I don't have a deadline, so ...
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1answer
43 views

Volumetric Scatter affected (Same file, different computers) CPU vs GPU

I've worked on a scene on my 2015 MacBook Pro and it looks great, but takes too long to render. I bought an RTX 2080 for my PC and the volumetric scatter is barely visible. Why is my RTX 2080 ...
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0answers
10 views

Discrete Version of OBJ Mesh for physical simulation

I am using SOFA physics simulation to deform a yarn, first i have to get a discrete. version of the OBJ mesh. which is know in the format of VTK There is an example in SOFA tested on bunny.obj and it ...
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2answers
78 views

How to make irregular Honey Comb

I tried to make this pattern using metaball particles inside volume. But couldn't acheive this pattern. DO you know how can I generate a mesh with this porous structure ?
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1answer
311 views

Is there a way to Import a Houdini Generated Volume (VDB) into Blender Cycles?

Is there a way to Import a Houdini Generated Volume (VDB) into Blender Cycles? We are working on a Uni project, and we cant seem to get a VDB into blender working at all. Has anyone done this before ...
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1answer
104 views

Copying these fluffy clouds?

So, there's plenty of cloud questions and tuts out there, but none seem to give me what I want, or work in 2.8. The guy I followed, this is what he came out with. The top left is his render, the top ...
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39 views

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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0answers
43 views

Volumetric lighting doesn't work

I am using Blender 2.8 with Eevee and there is a light source behind a window, if I hide the window the light works but not with the window. I tried to change the material setting but without success....
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0answers
18 views

Volumetric lighting is glitching out?

Trying to do volumetric lighting in Eevee with an area lamp. I followed this tutorial but whenever I add the volumetric material to the cube I get this weird stuff: I'm wondering if maybe its because ...
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0answers
13 views

Eevee volumetrics disappear after adding in noise texture

I'm encountering the exact same issue as this poster: EEVEE Volumetrics disappears when I plug in a noise texture to density node That post is from December. Does anyone know if this is still a bug ...
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67 views

Realistic Car Headlights

I was trying to create some realistic lighting for a car render and I am having a bad time creating the volumetrics for the headlights. Some of the renders looked very noisy and in general really ...
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1answer
55 views

Creating a translucent acrylic-like Shader

I am trying to make this model and as you can see in the reference, it looks translucent with a glow on the outer ring, like a solid block of acrylic with thickness. Also, as you can see, it emits ...
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102 views

Why I don't see the volumetrics in eevee?

I have a very strange question:I don't see any squares near the volumetrics bar in Eevee in 2.8.What can I do to solve this problem?
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1answer
37 views

Density texture in Voxel to mesh?

Hi , I am working on a scientific illustration. This is a porous structure of a membrane. How can I create the bottom part of the block? Can I convert the density voxel to mesh?
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0answers
24 views

How can i render only the Volumetrics?

I have a scene with a lot of "fog", it does take a while to render the scene. I would like to render only the volumetrics to reduce noise in it. How can I render it without anything else, is it ...
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0answers
23 views

Joined Mesh not Bouncing Light

I have 2 mesh objects with the same texture applied. One is bouncing light of the plane behind it, the other (a joined mesh) is not. Not sure what's causing this but I'm sure it's a relatively easy ...
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0answers
29 views

Principled Volume outside containing Object [duplicate]

I am using the 2.8 RC2 I want to create a Material that is seethrough and colored as there will be an object inside that must be visible. It will be a red Light Emitting Diode with innards. ...
2
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1answer
187 views

Volumetric Caustics + HDRI Backdrop

Goal Using Blender 2.79b + LuxCore, I'm trying to set up a scene, which would support, at the same time, both A) volumetric caustics and B) Hemi lamp + HDRI backdrop. Problem When I assign a ...
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0answers
78 views

Blender 2.8 volume over transparent background not showing in rendered image [duplicate]

I made this planet with a volumetric shader for the atmosphere Left you see the atmosphere rendered in viewport mode Right you see it just rendered out but now the volumetrics are missing Any ...
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0answers
84 views

EEVEE _ deactivate lamp on rendering with volumetric fog, and keep only the illumination

I m working a scene on EEVEE, and I had placed some extra spot lights to illuminate my focus object. Also I have used volumetric fog. I need to keep the illumination of those spot lights but not the ...
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0answers
33 views

Physically realistic air volume

What are the correct "color", "density", and "anisotropy" settings for real-world air?
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41 views

Why does combining a surface and volume node result in a black material?

I'm trying to make a fluid with something dissolved into it. It's almost opaque but there are some spots of lower density solute. This is why I can't just use nodes on surface alone--I need to be able ...
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0answers
80 views

Camera Projection Displacement

I have been trying to recreate this c4d/Arnold tutorial in blender and I'm stuck trying to Displace the mesh only in one direction (In the video the displacement is applied to the z axis. min 06:31). ...
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2answers
2k views

Why doesn't Volumetric follow the shape of Mesh in Eevee?

So I was in the middle of making a ball-shaped smoke, but the volumetric effect didn't work following the basic shape. It remains cube in Eevee Blender 2.8; while in Cycle it works, but in Cycle it ...
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0answers
64 views

Are eevee volumetrics always going to be confined to square shapes? [duplicate]

Far as I can tell eevee will always render any shape with a volumetric material applied as a cube or rectangle, as opposed to say a sphere or something a bit more complex. Is this a hard limitation? ...
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374 views

Visualizing 3D voxel data in Blender 2.8

right now I'm trying to visualize my scientific 3D data in Blender 2.8. So blenders built in textures or smoke simulations do not lead to the goal. I've read that older releases of Blender do support ...