Thats why in my previous post , I said

"frankly speaking I dont see that advantage in terms of visual quality"

Sometimes ago in Leadwerks forum a member posted two screen shots of the same scene
Which one do you prefer ? He asked
Most of the people answered : no preference , they are about the same stuff
An other group choosed the one on the right side,just a minority the one on the left side

Useless to say that the best shot was supposed to be , can you guess it ?
Of course the one chosen by a minority of people

Leadwerks demo run, at least on my moder PC , about half speed than the Unity demos
On my 5-6 years old PC at about 3 fps, on my 2 years old portable computer it does not even start
Unity demos are a rocket on all the three PC's ( and 3dgs demos are not that bad , too )

I wonder whether such advanced rendering features are really needed