Did you use volumtric lighting for that?
Not sure how the new volumetrics work in 3ds,
but Lightwaves volumetrics allow you to create and apply either texture maps, bumps, proceedurals etc...
if 3ds allow you to do that, you might consider trying to create a slight fire flicker heading out of the engines with the volumetric...(I don't do this, in lightwave, I jsut create the engine glow planes, stick a texture on em, set it to glow, then create an engine effect object, and apply my textures to them making it look like energy flowing from the engines, and work with trancaperencies to make it fade, then stick a light in there to cast lights from the engines...)
Though I can think of at least 4 ways right off the top of my head to do it differently...
But I do like the effect, it bleeds through the gaps in the hull nicely
