16
votes
Accepted
How can I remove black backgrounds from fire stock images to use in material with transparency?
The problem with the above setup is, using the image as mix factor directly or with the help of a Color Ramp converts the colored image into a greyscale image which gives a combined brightness value ...
- 24.3k
15
votes
Accepted
How do I make more complex LEGO simulations in Blender?
The final codes requirements are listed at the end of the post.
The tutorial by Ray Mairlot, which JBlock linked in the comments, is helpful for fluid simulations, or anything with a surface.
I will ...
- 25.7k
10
votes
Accepted
EXR color difference to PNG
Explanation first:
PNGs can't handle pixels that are emissive and transparent at the same time because PNG does not support associated alpha transparency.
You are on the right track using EXR, what ...
- 13.9k
8
votes
Accepted
Fire Doesn't Rise Up and It looks Fake
The fire doesn't rise because your objects are much bigger than in the video (~7 m sphere vs ~1.3 m sphere). Compare the size of the turbulence force field (2 m) with your sphere's size.
The fix is ...
- 13.5k
7
votes
Accepted
Managing flame direction (Cycles)
Overview:
You can control flame direction by Normals from Mesh that is your Flow object. In this example I'm using Circle filled with Triangle fan.
Mesh:
As I said before, simple Circle. You can ...
- 17.5k
6
votes
Accepted
What is Mantaflow?
mantaflow is an open-source framework targeted at fluid simulation
research in Computer Graphics.
via mantaflow website
If you are talking about mantaflow integration in Blender there is a branch ...
- 17.5k
6
votes
How to create fire materials using the new Principled Volume node that visually look the same as the "old method" of fire materials?
Here is my final result.
The result using the first node setup:
And the result using final principled setup:
Let me start of by saying that smoke simulation and rendering is not something I am very ...
- 6,863
6
votes
Accepted
I want to do -Back to the future- like flame stripes
Final:
Emitter:
For Emitter/Flow I've used two Planes with some Loop Cuts sized differently to have random fire width. Important thing is here real world scale. Both of them are 10m long and ~15cm ...
- 17.5k
6
votes
Accepted
Muzzle flash on a gun
Usually you wouldn't want to create a muzzle flash using a smoke simualtion. The flash is only visible for one frame.
I'd recommend you to parent a plane to your gun and create a Material for the ...
- 1,963
5
votes
Accepted
Why is my render not showing quick fire/smoke
Your Smoke domain material node setup is empty. Nodes are required for a smoke domain using cycles.
See an example here (smoke only):
A more complex setup for fire+smoke:
4
votes
Accepted
Simulate fire (quick way)
You may fake a fire effect using animated movie e.g. .avi or .mov (.gifs are not supported as @Mr Zak said) to project it (using image seqence texture node) on a plane with transparency.
Add a plane ...
- 33.2k
4
votes
Accepted
Why are there no tutorials of flames in blender render?
Blender Internal is well documented in the Blender Manual including smoke and fire domains. You will find what the settings do and how to set it up to make it work. It doesn't teach you how to put the ...
- 50.8k
4
votes
Accepted
Fire appears in preview, only renders emission
I recently had a similiar problem. Your render, in fact, is correct, but the result is displayed incorrectly. This is due to the way alpha is represented in the viewer, which uses straight alpha ...
- 385
4
votes
Accepted
What causes fire to gradually turn off or disappear?
In this case it is camera distance. But, instead usual camera distance, that is located in camera settings, this is volumetric distance, that can be adjusted in render settings
- 33.5k
4
votes
Accepted
Multiple Colors Flame + Smoke 1 Domain
Smoke
Speaking to smoke – I can only extend already my provided link in comment (or Zargul's answer) by more screens ...
For Domain object type in Color Attribute field color
... or use Atribute ...
- 34.8k
4
votes
Accepted
Should I be changing temperature min and max or reaction speed if I want my flames to go higher?
A high Fuel value will bring more fuel and make higher (but also bigger and more agitated) flames. A low Reaction Speed will speed up the reaction and make higher flames as well. To make higher flames ...
- 145k
3
votes
Strugging to render my fire animation with Alpha/Transparency correctly
Blender’s viewer is and always has been broken with regard to alpha encoding displaying correctly.
Apply your rendered fire plane to an alpha over, and you’ll see the emissive yet unoccluding fire ...
- 12.3k
3
votes
Accepted
Smoke shows on render, Fire doesn't
Attribute nodes are case-sensitive, if you change "Flame" to "flame", that should correct the issue!
- 169
3
votes
How can I Import Houdini Pyro VDB Cache data to Blender
Moving a pyro vdb (or any vdb for that matter) from Houdini to Blender 2.9, is fairly straightforward if your pyro sim is set up with a convert vdb and file cache sop.
Here is the end of the Houdini ...
- 12.3k
3
votes
Accepted
How to make this explosion look less orthogonal?
i don't think that this is possible without increasing the resolution because this is exactly what resolution if for. It "increases" the "details".
So here is the result for ...
- 54.3k
2
votes
Accepted
Add pre-rendered fire to scene
You can pre-render only the particle effects, then add a frame of the animation using Add Images as Planes (enable the add-on).
Then parent the image plane to the backdrop and change the source from ...
- 18.8k
2
votes
Accepted
How to block fire?
Select head and use smoke symulation then chose "Collision" (its on your screenshoot
2
votes
Fire & smoke not showing in render, but only in viewport
You turned off the domain's render visibility in the outliner.
Turn it back on.
- 3,665
2
votes
How do I make more complex LEGO simulations in Blender?
There is also an addon made specifically for this in Blender; may be worth looking into as it streamlines the whole process: https://blendermarket.com/products/bricker
2
votes
Accepted
Making flaming particles?
Set the flow source on the emitter within the domain to Particle System, and select your particle system.
You can then set the size of those particles below. It will always be a spherical inflow ...
- 322
2
votes
Accepted
Too much smoke compared to the source mesh size
I can see your domain covers way more volume then the rocket and the jet itself. The minimal amount of smoke rendered would be the amount contained in one voxel, looking at the shape of the smoke I'd ...
- 86
2
votes
Explosions and fireflies / dots in Blender 2.8 (already followed all tutorial without results)
The only way to do this without denoising is increasing the number of samples up to about 2500. It takes a long time to render, but your image stays crisp.
- 21
2
votes
Accepted
Why is my fire simulation so light?
Try black environment ...
Also there is nothing wrong to use Principle BSDF node :)
blender 2.8.1
blender 2.8.3 - 9.x (Mantaflow solver)
- 34.8k
Only top scored, non community-wiki answers of a minimum length are eligible