Parallax Shader Improvement (1:1; 1:2; 1:3 ratio)

I’d like to have more control over the parallax shader. Currently it seems
like the only format it likes is the 1:1 ratio, basically speaking - a cube.
The wider the texture is (Like a 1:2, 1:3 ratio), the more distorted and
unnatural it looks. As shown on the attached image (Green arrows show proper
perspective), you can see that the floor is sort of sloping downwards, which
looks quite odd. It does work but if this shader is improved it’ll allow us to
use it a lot more for close up objects, not just distant ones. Thank you.