Hey I have a little question - I don't know if this is the difference in GMS2.3 versions, I'm with the latest version as of today (December 18). There seems to be a distortion when we get very close to a wall or look at the floor, here's two pictures about it:
https://i.imgur.com/0aAL3cr.png
Know that I'm not expecting you to update this quickly or even at all, and if I fix it I'll let you know how I did it - however the problem is an easy fix please let me know :p
EDIT: You answered me on the Discord channel, I'm leaving the solution here for others: 