I usually never find the time for these, but lately I’ve been doing so much realistic, a bit of stylised fire was exactly what I needed 
‘Final’ Version:
It still needs a burning/glowing decal…
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Small update:
-Darker background
-Decal added
-Smoke and flames tweaked
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It looks really good! I really like what you did with the gem-esc detail around it. The only point I would say seems off is maybe the fire is a little slow, but that effect could be intentional. Awesome stuff!
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Excellent! Super cool stuff.
I had some time this evening to try out an idea I always wantet to test.
It’s maybe not the perfect usecase, but the idea is intersting nonetheless, so I thought I’d share it.
Basically I’m sampling the GBuffer to spawn particles based on luminance and I color them also via GBuffer.
In addition, to break up the spawning, I sample a WorldAlignedTexture, which pans and is also used for the ‘rejection’ sampling.
The result looks like this:
I’ve done this quick and dirty, just for testing, here is the breakdown, in case it helps anyone :
- Set to GPU Emitter with very high spawnrate (in my case it’s about 10000, not optimal)
- Create bool ‘KillMe’, which we use later for rejection sampling
- Spawn particles in a cylinder around the area that you want to cover
- Place particles on nearest DepthBuffer location
- Sample the GBuffer for the color and the luminance rejection sampling - whenever the luminance falls underneath the Threshold parameter, I set KillMe to true
- Sample the WorldAligned texture and again, set KillMe to true if SampledColor.R is underneath a threshold (0.3 in my case)
- Kill all KillMe particles
In case your SceneColor doesn’t sample correctly, you can always try BaseColor instead, just make sure you’ve actually plugged something into BaseColor wherever you want to sample it, e.g. here my burning wood decal material:
This method could also be used to only spawn on a specific SceneColor color, rather than luminance based. E.g. only on Red.
That’s it, hope it sparks some ideas for other people
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Hi Tobias!
I was really curious about how you made that whispy smoke, it’s exactly what I need, like photoshop approach at material/Niagara system would be great to see!
Hey Jack!
So it’s actually quite straight forward. A tampered cylinder with some noise running over it + World Position Offset on top. If you layout the UVs correctly it’s quite easy to do fade-in/out just via the TexCoord node. Simon explains this exact method in his talk here:
Mesh looks like this:
Panning texture somwhat like this:
Material Panner:
Material WPO:
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Unfortunately didn’t have more time for this, but here is the final result with slight tweaks + breakdown of individual emitters
Breakdown:
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You’re a star! thank you very much for this, it will be a great help to me
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can I just ask what your material ended up being? was it translucent? and did the material panner go into the opacity or opacity mask?
No problem dude
Yes, translucent. And opacity. Opacity Mask is only for Masked materials.
1 Like