I got 3 problems with phoenix and octane:
1. If you enable movable proxy and motion blur octane will not render fire mb the right way. (velocity channel was checked in phoenix during sim) Do I also need to output SPEED channel?
2. Then if you close octane viewport and uncheck movable and mb and go back to octane viewport you will see no fire until max is restarted. So hiding volumes bug is still here
3. Octane renders flames as tiny horizontal lines. Chaos said it can be octane problem. Vray renders flames very smooth
Here is the scene link to download: https://we.tl/t-Fb18DTbp3t