The installed version of FumeFX is not fully supported. The minimum supported version of FumeFX is 5.0.
This message means that currently there is an unsupported version of FumeFX installed. In such a case Corona Renderer will use native 3ds Max atmospheric effects to render FumeFX, which may result in incorrect, lower quality rendering.
FumeFX and Corona Renderer Compatibility
Note that FumeFX versions 5.0.0 and newer are not 100% compatible with Corona Renderer and their output should be exported to VDB format before rendering. This situation is temporary and compatibility should soon be restored.
Solution: Use VDB export from FumeFX to export your sim, then import the VDB sequence into Corona Renderer using the Corona Volume Grid:
Set up your simulation
Open the FumeFX menu
Set up the path to a folder where the resulting VDB files will be stored:
Start the simulation and wait for the VDB files to be exported
Remove FumeFX from the scene, or hide it
Create a Corona Volume Grid
Click load from file
Browse to and select all of the exported VDB files
These instructions are for creating the FumeFX simulation in the same scene where it will be used. Since the simulation is saved to VDB files, you can also export the simulation from a separate scene should the need arise.