Hey there. I had absolutely the same issue with glass and shadows. So what I am suggesting to do: you can create a super simple skeletal mesh vehicle in blender, make a rig. You actually can operate the rig right through BP. In BP attach static meshes of original high-poly car to skeletal mesh in BP. Make static meshes Nanite and that should work.
Apply transparent material for your “dummy” car and that’s it. Hope I made it clear!
Good luck!
1 Like