Is that using some custom effect of blender? You can only transfer the most basic stuff from blender to jME, the effects aren’t a 1-1, you need to replicate the effects in jME yourself
Halo nor Volume material are not supported by JME. Idk if the blender loader can load wire materials.
The Halo material is very specific to blender, and usually in 3D engines glow and all kind of flares are done using post processing or particle emitters.
Now maybe with some good shader knowledge you could achieve something similar to what blender does, but remember that this material only work when you render with blender, I don’t think it’s meant to be real time.