Hi guys!
I did a couple of smokeless fire simulations with the pyro solver node rasterizing the temperature, density and burn attributes.
In the viewport it seems as I liked to, and in the Mantra Render viewport It appears too, but when I save it to disk, my .exr sequence is empty, I know this happens because of the density, but I don't know how to fix it.

I tried everything: enabling flame density and converting to vdb in the post-process, changing the bindings... and nothing happened.

The only way to see fire was transferring the RGB channel to the alpha channel in COP's, but the resoult wasn't very nice.

I saw a lot of tutorials, a lot of courses and a lot of renders of smokeless fire but I don't know how to render it and any of these videos helped me, I'm so frustrated and I don't know what can I do.

Thanks in advance.

Lots of threads on this issue, flames don't have opacity, so no Alpha, so they disappear when premultiplied. Enabling flame density should do it, but you have to make sure to have density in your shader. Use the toggle transparency button on the right toolbar of your Mantra rendering window to make sure it works before rendering it to disk.

Hi, I have the same problem but don't understand how I'm supposed to make it.
I tried using a ROP to make it "leave unpremultiplied" but when I render with the ROP file output, it still doesn't convert in RGBA. .

I don't see thebutton you are speaking about.