So, let's say this picture represents the original game output, before any shader modifies it. A single view, where the horizontal and vertical proportions are the same.
What ReShade does is to intercept the graphical calls and modify them with different effects depending on the applied shader.
The first shader I apply is SuperDepth3D, which draws two different views (from two slightly different points of view) instead of just one. In "side by side" mode, the two views are drawn besides one another, and they are squashed horizontally to make them fit the screen.
In order for them to have the correct proportions, I apply a second shader (3DAdjuster), which lets every view to be moved around, stretched or squashed independently. I set it to squash the two views vertically.
Now, while this works, it has two drawbacks: first, visible black bars remain at the top and bottom of the scene. Second, it halves the vertical resolution. So I was thinking: would it be possible to tweak some options to double the vertical FOV, while leaving the horizontal FOV unchanged?
This would be the result, with no shader applied. Compared to the original image, this one would look squashed vertically, but more of the environment would be drawn at the top and bottom.
At this point, if I applied the SuperDepth3D shader, the image would get squashed horizontally, but its proportions would already be correct and the two views would occupy the entire screen, with no black bars, like this:
What I want to know: is it feasible?
