Blender Eevee Fire with transparency issues

tddavistddavis Moderator, Website User Posts: 4,195 Moderator

Since last Hallowe'en when I was doing my annual video and I ran into this issue I have racked my brain on it.  Eevee will not render decent fire with a transparent background in PNG, EXR or TIFF formats.  Just the past couple of days I got turned on to compositing nodes and using a tutorial by YogYog Alpha for Bloom in Eevee with transparency I have managed to get it looking just about right see:

https://live.staticflickr.com/65535/50013865608_e78e93ad63_h.jpg

This is a screen cap of a render of procedural fire in Eevee using an alpha node in Compositing along with a Bloom pass and.an emit pass. But this is what the PNG looks like:

https://live.staticflickr.com/65535/50014371016_d2ba3d7c0f_h.jpg

The colors have changed dramatically and it's lost the light emissions even though they are there on the screen.  I seem to recall a discussion about colors behaving weird in avi's because they don't have alpha channels to feather the edges and that's what it looks like here but there is an alpha so I am stumped what I am missing...or rather what the outputs are missing? :)  Any one have any ideas in color/alpha terms what I could add or change?  Thanks.

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