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I'm doing my first project in Blender. I started in 2.82 and am now using 2.90. I'm making a frost sword where I want a nitrogren mist to fall down from the blade's edge defined by a vertex group. I succeeded in that while modelling, but then I did some changes to the model, and now I can't get the mist to work again. Even if I add completely new simple object to the scene and do quick smoke and bake, nothing shows up. If I open a new blender file and do quick smoke, it shows up fine, so I assume some scene setting has been messed up. It's been driving me nuts for hours now, so any help will be greatly appreciated.

Model file here.

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2 Answers 2

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No one , Not the blender file , not the model , not the primitives , not the simulator None of them is at fault.When you make a simulation , you also bake it , and im sure you also did that , if you bake the simulation , what it does is that it records the simulations animation so that it doesn't have to do heavy calculation it does while making the simulation for the first time , so try rebaking and come back again

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  • $\begingroup$ It's already baked, no smoke visible. $\endgroup$
    – Nick W
    Oct 14, 2020 at 11:06
  • $\begingroup$ have you baked it again? $\endgroup$ Oct 14, 2020 at 11:12
  • $\begingroup$ Yes, I have done so. $\endgroup$
    – Nick W
    Oct 14, 2020 at 11:44
  • $\begingroup$ Please check what is your cache mode , replay or modular $\endgroup$ Oct 14, 2020 at 14:58
  • $\begingroup$ Its Modular mode. $\endgroup$
    – Nick W
    Oct 14, 2020 at 15:11
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Turns out the problem was caching. I had a cache left over from the last attempt I made at a smoke simulation, and according to the warning in this documentation, Blender doesn't like multiple caches.

So the solution was to Move the Blender file to a new folder and add the smoke effect there, then it ran perfectly. For some reason it wasn't enough to delete the old caches, I had to start over in a new folder.

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  • $\begingroup$ Use "free all bakes" instead. $\endgroup$
    – no-can-do
    Oct 14, 2020 at 19:40
  • $\begingroup$ Thanks for the tip! $\endgroup$
    – Nick W
    Oct 15, 2020 at 15:38

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