Godot Oblique 3D camera like in Tibia request

A square box displayed in oblique	in 3D view, we can see it as in real life

Now the light can be realitic calculated as in real life using 3D geometry without the skew distortion on walls and models.

the below scene is the real 3D geometry without the distortion of the camera

I enabled some some heavy light effects, but it ran well on my Intel UHD 630 igpu. The camera distortion has no impact im performance.

See the sunlight entering the window in sunset

The scene can have any 3D light and shadow technology.

If I not mistake this is the link of the branch https://github.com/ghsoares/godot/tree/camera_orthonormalize_transform_4.0