Questions tagged [volumetrics]

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

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117 views

Adding a Texture to a Volumetric Drastically Increases Render Times?

so, I've been trying to render clouds using Cycle's Volume Scatter node in a way that doesn't murder render times. Plugging Volume Scatter into the Volume option of a Material Output, works fine, ...
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256 views

“Inside & Outside” volumes IE glass within glass (cycles)

How can we manage "glass" interfaces which have a different volume (absorption) on each side of the interface. For example colored liquid within a colored glass. I understand that to manage correct ...
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219 views

Does GPU volumetric rendering work with Mac Pro Radeon D700s?

Has anyone successfully rendered smoke (or any volumetric shaders for that matter) with GPU on a Mac Pro with Radeon Firepro D700s? I saw that smoke/fire is supported on Open CL (as listed here: ...
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1answer
938 views

How do you make an animated mist / smoke with lights that go through it and interact with it?

I want to do a small patch of mist or smoke, and have lights go through it and light it up, in an animation. I've seen the mist option directly in the interface, but as far I know it creates mist ...
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133 views

Why is my beer black?

I've been following this blender guru tutorial (Link to relevant section of tutorial) However, once I try to render the beer material it is coming out black I've followed very closely with the ...
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180 views

Volume material is not rendered onto environment map

I have an object with a volumetric material in the scene which renders a bunch of clouds correctly from my camera. I set up a cube to create an environment map by setting up the texture as environment ...
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0answers
32 views

Where is “volume sampling” options list in 2.76? [duplicate]

I am going crazy here, where is the option for the volume sampling in Cycles Render in the new Blender version? Normally you can choose either "Distance" or "Equiangular", I can't find it in the ...
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911 views

Voxel data as image sequence in cycles

I have image sequence of an object. How to render it in cycles as voxel or volume? Image sequence represents a slices of 3d object. Images are in .png. I would like to turn theese slices in 3d object ...
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1answer
1k views

How to make the light from the flashlight in Blender Cycles? [duplicate]

How to make the light from the flashlight in Blender Cycles? The Emission node doesn’t give volumetric light: I'll use it in animation, example: .
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1answer
678 views

Help me understand why my cycles render is so slow

This is NOT about asking how to speed up cycles renders. I am just confused to why a scene has taken so long to render. Here we go: I have a camera (WOW) looking up into treetops. Pretty simple. ...
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1answer
46 views

Area Lit with Volume Lighting

My understanding is that if a light is brighter, it will light a larger area. (Like a point light.) If I try this with a volume light, it seems to only light an area proportional with its scale, not ...
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1answer
44 views

Not able to pull off simple combination of volume scatter and volume absorbtion: cycles

I was following ben u's tutorial on Basic Volume Shading. https://www.youtube.com/watch?v=9Ybk0qNFhqw I was doing OK with "Volume Scatter", but as soon as I put in the "Add Node" (3 min 46 seconds in ...
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2answers
186 views

How to create white volumetric clouds in a dark scene?

I am trying to create a scene which has a black background and the only ways to create volumetric clouds that i've seen results in ones which look believeable in light scenes but in dark ones they ...
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1answer
124 views

Create a light material which is seen as a focus in Cycles [duplicate]

How can I make a light material which is seen as a focus?
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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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1answer
56 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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1answer
145 views

How to make a patchy cloud layer?

I want to make a cloud layer like shown in this image (where parts of it are empty patches). I tried doing this by applying a volume scatter shader to a cube and then controlling the density with a ...
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1answer
312 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
1k views

Volume Scattering in 2.8 Doesn't work?

Volume scatter not working in 2.8 build for the Mac? I tried plugging in the volume scatter node to the world output and checked the volumetric box. But nothing happens in Eevee! Please help.
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1answer
622 views

How to add fog in the compositor in blender 2.79

I want to add mist/fog in the compositor for my scene but i dont understand how to add it. I have looked up and nothing seems to tell me exactly how to do it because in my version of blender (2.79) ...
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1answer
83 views

Volumetric haze is showing through solid objects when 'stacked'

I have my whole scene contained in a big cube, and the cube's shader has both volume scatter and volume absorption (which are mixed with an add shader). So the whole scene has haze. Then, where ...
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1answer
66 views

How are textures generated in 3D in compared to 2D

I'm curious on how Blender generates textures in 3D space for Volumetrics compared to 2D textures for a surface.
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1answer
145 views

increasing density of beam light in volume rendering [duplicate]

I am simulating in animation a film projector with a light beam in volumetric. On the pic attached you can see that the beam is quite light.. I want to densify the beam more like an intense light ...
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1answer
257 views

Why does my volumetric light disappear when I disable camera visibility?

I have been playing around with volumetric lighting and wanted to make a basic render. I create a point light put a UV sphere around it and deleted some of the faces to get the volumetric light. ...
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1answer
3k views

Particle not showing up in Cycles

I wish to create some dust particles but my particles are not showing up. I used some generated objects for the matter, put them in a group and use the group for the particles. The size is scaled up ...
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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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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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53 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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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
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
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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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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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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1answer
44 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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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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40 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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44 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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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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0answers
104 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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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
80 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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85 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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33 views

Physically realistic air volume

What are the correct "color", "density", and "anisotropy" settings for real-world air?
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42 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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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). ...