I'm developing an art style that blends 2D with 3D. For that purpose my camera is tilted at a 45° angle and set to orthogonal mode, to achieve this effect. The thing is, because the camera's shape is a square, it distorts my 2D plane, making it shrink in the Y-axis.
What I need is, if possible, to change the camera's "shape" into a rectangle, while still being in orthogonal mode. Is it possible to do this in Godot?
EDIT: Here's more info and screenshots to show what I'm trying to achieve:
The objective is to mix 2D with 3D. The game, at first, looks like a 2D game, but the user can change the view angle at any time, revealing a 3D game, but still feeling 2D.
This is my main scene:

And from the camera's perspective, it looks like this:

The "squared" area appears thinner due to the camera's shape: being it a square. I managed to do a trick involving viewports and shaders to stretch this to become a perfect square.
However this feels like too much hassle for something I think is as simple as being able to manipulate the camera's shape. So, is it possible?