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I am using 2.83a and I am trying to create smoke from a chimney stack of a steam locomotive.

The plan is/was to animate the domain along with the ground surroundings - long story.

I have been tearing my hair out trying to find the right settings for the smoke emitter and domain - I would have ideally liked a small amount of fire and a generous amount of smoke, but I cannot seem to prevent the emitter from spewing it in all directions, any setting less than 1.0 from the surface of the emitter results in no smoke.

A more satisfactory way to animate the smoke is to use the emitter to emit particles. I've successfully managed that in the past but I am not sure what I am doing wrong now.

The Emitter is set to emit particles and die out shortly afterwards - it isn't affected by the domain so I have a wind force field. If the particles emit smoke, it will look spot on.

enter image description here

The domain is set up correctly so far as I can see, buoyancy density is set to -1 so the smoke sinks, heat to 1.5 and vorticity 0.

I've turned off noise for now, turning it on and off made no difference.

What am I missing?

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1 Answer 1

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There's something with the new version of Blender that requires you to Bake Data in the Smoke domain to start producing smoke.

https://www.youtube.com/watch?v=XN6ClIdL8yw&feature=youtu.be

Playing with the fuel value, might help to choose how much fire you want.

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  • $\begingroup$ Thanks for the quick reply. Believe me, I have been playing with the fuel value and every other value - but that is for smoke only. The particle emitter can only do smoke or fire, it can't do "smoke + fire". The problem is the particles are not emitting smoke. I quickly made up this test file and it's not working here either. I did manage to make it work at some stage, but I am blowed if I can figure out what the special case needs to be. When I was going it I was using cycles....and I am currently in Eevee. does that make a difference? $\endgroup$
    – DrIgnatiusCole
    Commented May 4, 2020 at 19:16
  • $\begingroup$ There's a "smoke+fire" option, when selecting the Flow Type. The quick smoke tool is a handy way to create smoke. In the Physics section of the Smoke Domain there are ways to control the Smoke, Fire and the dissolve rate for the smoke. i.imgur.com/6MxaSIt.png $\endgroup$
    – Manu G
    Commented May 4, 2020 at 21:33
  • $\begingroup$ Also check these out, youtube.com/watch?v=_RKAL5zST84, youtube.com/watch?v=HUS8LvST86k, $\endgroup$
    – Manu G
    Commented May 4, 2020 at 21:46
  • $\begingroup$ Hi thanks Manu - these are great tutorials but they don't really help - I have watched nearly every smoke tutorial there is. The issue is I wanted constrain my smoke via particles, having re-consulted the manual, I think my issue is the size of my model and how much smoke I want to produce. I wanted to get a lower res idea of what I wanted to do before committing to a long bake. But the problem is I needed a much much higher resolution in order for the smoke simulation to work properly. $\endgroup$
    – DrIgnatiusCole
    Commented May 5, 2020 at 6:16
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    $\begingroup$ Hi Manu, Yes! The issue was that after setting the Flow source to be the particle emitter, you also have to set the "Particle Settings" which is a non-obvious field that opens below it. Another issue is that I believe "motion blur" needs to be off unless outputting animation. I'm planning to write up a complete list of settings and post it for others. Please contribute to it if you can when it goes up. $\endgroup$
    – DrIgnatiusCole
    Commented May 8, 2020 at 7:20

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