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As you can see, smoke looks very blurry.

I have tried everything people said on other forum, but since the way blender simulates smoke has recently changed, most of it isn't helpful.

My absolute mess of a smoke

This was with 200 resolutions division and 3 upres factor. Most tutorials I watched used these setting or slightly more or less, yet they got noticeably better results, whether in viewport or rendering.

I don't see what I can do to up the quality, the edges are fuzzy and the whole picture is overall blurry.

Any help would be appreciated

Edit : this is with denoising :

enter image description here

better, but still nowhere close to the cool high definition renders

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    $\begingroup$ Try significantly increasing Max Steps in the Volumes render properties and/or decrease the 'Step Rate' for render and/or viewport. $\endgroup$ Nov 3, 2020 at 12:24
  • $\begingroup$ I don't know what tutorials you are watching, but that looks pretty comparable to what I've experienced with ~200 resolution divisions. The upres factor will not improve the appearance as much as increasing the resolution value. $\endgroup$ Nov 3, 2020 at 14:41

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Number of Divisions has nothing to do with "blurry" result. More divisions gives more details (volume grid is detailed). You can try to sharpen with ...

Default 32 Divisions enter image description here

add Math node Multiply 100 into Density socket enter image description here

add node Color Ramp enter image description here

to get rid of lines change Render Properties > Volumes > Step Rate 0.1 enter image description here

(Step Rate - lower value means less "lines" in a volume.)

Play with ColorRamp to get more or less of volume ... enter image description here

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    $\begingroup$ This worked like a charm ! Thanks, I didn't expect this ! $\endgroup$
    – user310148
    Nov 5, 2020 at 12:46

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