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I made animation in 2.79 & I opened it in 2.82 to render. All effects work (dynamic paint, ocean, particles, soft body), but fire doesn't work. It doesn't even appear in preview window. Also, all fire settings were reset. I found answer how display fire, for this need to change Type of Domain to Replay. But Bake button disappeared.

How to bake fire simulation on Replay? Other types Modular & Final don't display anything even after baking. Or what to do so that fire is displayed & rendered in 2.82 Cycles (and preferably with settings from 2.79)?

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2 Answers 2

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With blender 2.82 a new fluid simulation engine was introduced called Mantaflow. So that is the reason your old simulations are not working, you can try using a older blender version.

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  • $\begingroup$ Thank you for answer. I didn't know about Mantaflow. I checked in 2.81a, fire was able to render as in 2.79. Only unfortunately Denoise node in this version of Blender works worse & blurs all details. And what does Mantaflow mean? What is its difference from previous engine? $\endgroup$
    – Juliya
    May 6, 2020 at 6:23
  • $\begingroup$ Denoise in 2.81 works perfectly fine, make sure you are using the new denoise node based on the Intel denoiser. First go to view layer properties and turn on denoising data and go to compositor and add denoiser and connect noisy image, denoising albedo and normal to the denoise node. $\endgroup$ May 6, 2020 at 15:40
  • $\begingroup$ I do everything so how you said. But when I compared the same frame in 2.81 & 2.82, I saw difference. In 2.81 is more blurry. $\endgroup$
    – Juliya
    May 7, 2020 at 3:23
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You don't have to bake if you set your cache type to replay. You can simply hit the space and it will start baking in real-time(which means you can see what is happening in the viewport and make changes accordingly). You will have to set it to modular or final to bake. Note that your you can play with a better fps if you bake it with modular or final

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  • $\begingroup$ In real-time it plays sooooo long. Even much longer than in 2.79. Modular & Final don't work. These types don't show anything even after baking. $\endgroup$
    – Juliya
    May 6, 2020 at 6:20
  • $\begingroup$ what do you mean by so long $\endgroup$
    – JacksonPro
    May 6, 2020 at 6:24
  • $\begingroup$ When click Play, then fps ~ 2-3. And this is with default settings. It's difficult to make any settings with such low fps. $\endgroup$
    – Juliya
    May 6, 2020 at 6:32
  • $\begingroup$ you will have to pause to make changes. Also, you have to hit the bake button if you are using modular or final. note if you bring the resolution of smoke down you can bake faster even in replay $\endgroup$
    – JacksonPro
    May 6, 2020 at 6:35
  • $\begingroup$ Modular & Final types don't work. Therefore, I can't bake simulation. And in Replay such low fps always. I created new file, added cube & Suzanne, made Domain & Flow from them & played animation. Fps ~ 3. $\endgroup$
    – Juliya
    May 6, 2020 at 6:50

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