whenever I export an exr with a Pyro Sim, the fire shows up in the viewport, EVEN in Mantra Preview render, but in AE or any image viewer only the smoke shows up.
Any ideas how to solve this? Even when using opengl output node, i don't get the flames, just the smoke.
The flames won't create an Alpha if there's no density to accompany them. You're probably looking at your render unmatted in the Mantra preview and premultiplied in AE. When multiplied by an Alpha of 0 the fire will disappear. Try to import your exr as unpremultiplied and you should see it.