TL;DR you NEED gamma correction.
I’ve seen here and there screenshots of jME scenes which are obviously not using gamma correction.
I want to insist on the fact that without gamma correction Lighting in general (PBR or Phong) is wrong!
And it’s even more obvious with the new PBR material.
You may have tweaked your lights and materials colors so it looks ok, but it still wrong.
I understand that you’d want visual consistency for an old project and that you wouldn’t want gamma correction.
But for new project please, check the gamma correction box in the starting dialog box.
In 3.3 I will remove this checkbox and enable gamma correction as a default. You’ll only be able to deactivate it programatically.
For reference, interesting reading:
our doc :
why it’s important :