Questions tagged [volumetrics]

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

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GPU Compute (CUDA) Frequently Crashes Computer

I've run into a rather irritating issue when dealing with a somewhat computationally complicated scene (attached below) that is essentially just a pile of volumetrics and lighting. Whenever I set my ...
3
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1answer
1k views

Volumetric cloud render noise in Cycles

I'm rendering volumetric clouds using Procedural cycles Clouds shader. I'm getting a good result, but with a strange noise (middle bottom screen): It's about 180 passes. As you can see everything is ...
3
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2answers
2k views

Can I create a separate Volumetric pass for Blender Cycles 2.70?

I have a complex scene that I would like to render with GPU enabled, is it possible to add a volumetric pass from a separate, CPU only, volumetric render? (Volumetrics are not currently compatible ...
3
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1answer
209 views

Volumetric fire looks cuboid

I do not know why. The tutorial I followed was https://www.youtube.com/watch?v=D_ybn4tYxs4. I am not able to get the result of a nicely shaped flame. Below is my set up for the domain:
3
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1answer
245 views

Rendering many overlapping parallel lights

In my situation, I want to render many narrow spotlight all overlapping in mist. You can see in this image how all the spotlights overlap. The rendering I'm trying to produce is a simulation, and ...
3
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1answer
186 views

How can I add more god rays coming out of the holes?

I am trying to render my first volumetric lightning logo and there are two light planes inside the logo where the inscriptions "PC", "&i", processor are. So what I want is for these planes to ...
3
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3answers
277 views

Dots show on Volume material

So I've done the atmosphere, but the Volume material has given it loads of dots. I assume this is the resolution of the Volume light but is there a way to get rid of them without bumping up the ...
3
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1answer
124 views

Transparent object shaddows in volume material [Blender Internal]

Currently I am fighting with lighting artefacts within a smoke simulation, when the lightsource is within the volume and especially also within a transparent object within this volume. (Note this ...
3
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0answers
129 views

Why are volumetric reflections invisible? [duplicate]

I have a test scene where a very thin and bright spotlight (almost like a laser) shines on a diagonal mirror in a volume that scatters light, such that the light beam is directly visible. The mirror ...
3
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0answers
200 views

How to align a volumetric texture along curve? [duplicate]

I need a Cycles volumetric material that appears to flow along a curved path. Specifically, I would like to stretch a texture along the direction of motion to mimic streamlines in fluid flow. I seem ...
3
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0answers
214 views

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 ...
3
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0answers
155 views

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 ...
3
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0answers
164 views

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 ...
2
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1answer
7k views

Volume Scatter in World makes the sky turn black [duplicate]

While using the "Volume Scatter" option in Blender the Background turns Black. (I am using Blender 2.79). Here is my issue in detail. The first image below shows a normal scene with Blue sky (Set ...
2
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1answer
823 views

HDRI With Volumetric to Create Throw Pattern?

I have a scene below where I am wanting to get an HDRI image to come in through the windows and light the scene in the window areas and have a god ray like effect. I want to do this with a volumetric ...
2
votes
1answer
367 views

Volumetric scatter shader does not show light focused through lens correctly

I am trying to make the light from a convex lens shine through haze in a volumetric scatter cylinder like this: https://www.behance.net/gallery/53917965/LENSES-TEST I can see that my lens does ...
2
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1answer
3k views

Smoke drastically increases render time

I have a scene in which I added some smoke to enhance an object's movement. As the scene is set in the clouds I have a lot of volume shaders, which I have had no problem rendering. After adding the ...
2
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1answer
735 views

How to render in cycles volume with camera inside

I know there were tricks like cutting inside the volume object with another object with boolean modifier (this one I'd like to avoid) and another with putting the camera inside some sort of a bubble ...
2
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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. ...
2
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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 ?
2
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1answer
191 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 ...
2
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1answer
43 views

How to make an item transparent but keep the shadow of it

I have a project where I need to see light rays. I have a light source which is a sphere : Over it I have an Icosphere where I removed some faces to let light pass through it : I wanted to enhance ...
2
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1answer
166 views

Light an object with an inner light and volumetric world

I have a set up where there's a box with holes (dice) with a point light inside it, with volumetric settings, so that the rays coming out of the cube are visible. The problem is, you can't barely see ...
2
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1answer
807 views

How can the Blender Source Code be used to extract isosurfaces with Dual Contouring [closed]

for my current project i try to solve the following problem: My starting point is an arbitrary point cloud consisting of 3D-Coordinates that is to be voxelized to form a regular scalar field. --> ...
2
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1answer
857 views

Turn down volumetric smoke scale

I want to make some small smoke plumes using Cycles volumetric smoke. Think cigarette or car exhaust size. However, the default scale of smoke detail seems to be very large. Using default unit scale (...
2
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1answer
1k views

I can not have environmental map and volume lighting at the same time?

I am doing a scene, where I need to have a environmental texture as the background,and that texture is called an equirectangular map. I also need to have a volume lighting in the world as well. But ...
2
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1answer
1k views

How to voxelize and extract blender data?

I am trying to use Blender as a CAD tool for electromagnetic simulations. I have modeled the geometry, but now would like to export it to a format that I can read for the simulation (external Python ...
2
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1answer
605 views

Is it possible to render other materials besides volumes using a procidural texture to define “density”?

In other words, is it possible to render an image of a cube like this: But make the "spheres" refractive as opposed to scattering volumes? When I attempted with this (I did not expect it to succeed):...
2
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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?
2
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1answer
63 views

Visual imperfections while rendering with scattering atmosphere

I've been experimenting with a photorealistic animation of an Earth-like planet, but I've been having a couple of rendering issues regarding the atmosphere volume material: Visible red areas on the ...
2
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1answer
671 views

Creating realistic concert lighting

I've been trying to create a live venue in blender recently, but have gotten stuck at the point of making realistic spotlights. First I tried using a cylinder mesh with an emissive transparency ...
2
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1answer
425 views

Cycles Volume Scattering with Voxel Data

Problem I am trying to visualize the electron density of some simulations. The data would consist of a file with the density of electrons at each point in space. From reading documentation I have ...
2
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1answer
1k views

How to make moving fog [duplicate]

I tried the mist effect and the smoke simulation but didn't like the results. What I want to achieve is a static fog like the fog in this picture. Steady but also moving slowly on the surface of lake....
2
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1answer
133 views

Volume is rendering through objects in foreground

I'm trying to recreate the planet with the asteroid belt from the force awakens, but my renders come up like this. Atmosphere and without respectively. You can see the asteroid belt that is behind ...
2
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1answer
118 views

Combine 2 Scenes / Volumetric Fog from BI to Cyles

I have a complex scene rendered in cycles and now like to add some volumetric fog rendered in BI. I have linked some objects from my cycles scene to a new BI scene and added a cube with a volume ...
2
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0answers
68 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 ...
2
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0answers
122 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 ...
2
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0answers
17 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'...
2
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0answers
70 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 ...
2
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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? ...
2
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1answer
2k views

Blender EEVEE not rendering smoke simulation

For some reason the EEVEE viewport is actually rendering the smoke simulation, however, on the actual render, it does not seem to render it at all as if it's excluding it. I have checked Volumetrics ...
2
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0answers
490 views

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 ...
2
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0answers
467 views

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 ...
2
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0answers
566 views

Transparent background hide volume emision (cycles) [closed]

Why transparent background option hide volume emission? I use Cycles render. Blendfiles: http://www.pasteall.org/blend/33111 http://www.pasteall.org/blend/33112
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1answer
165 views

Smooth the jittering colors of smoke simulation

A recent project of mine involved smoke sims and materials. This is the result, and it's mostly what I was aiming for. However, its colors are jittery and seem to move around. Here is the material: ...
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2answers
65 views

Fake flashlight volume with smoke: how to make noise texture coordinates not to follow camera

I'am trying to fake effect of volume light beaming through smokey fog using emission shader on torus with noise texture plugged into volume output. I get the effect, but when I move camera around ...
1
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1answer
274 views

Replicate the light coming from a projector

Trying to create projection light to put on a scene like this 1 Click to enlarge. Example of the light I want to create. How would I do something like this?
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3answers
1k views

Trying to fake “God Rays”/ Stage Lights with materials

I feel like this could be done but a combination of math nodes but I have no clue how to set it up. I have a spot light with a cone parented to it. The cone has scatter and absorption. Is there a ...
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2answers
596 views

How can I get a volume to expand uniformily in all directions, like a nova?

I would like to simulate a star exploding into a nova, ie  I have a quick smoke where the density is keyframed, emitting smoke from a sphere for few frames only. I need a force that pushes this smoke ...
1
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1answer
265 views

Volumetric Lighting

I have Blender version 2.74, and I just can't find a way for myself to create volumetric light, I tried setting in world properties the Volumetric Scatter and then at the bottom enabling Homogeneous, ...