Fish Eye effect BGE with stereo

Hi, does someone know how to get the fish eye effect on blender game engine by fish effect I’m referring to this:



so I dont want to get the 180° FOV, I just want the bubble effect of what the camera is viewing, but there’s something else, the thing is that I’m using the side by side stereo view that offers the BGE, I already look at the solutions posted here but only refers to the cycles engine or not work with my side by side stereo view so, if someone knows a solution for this I would be very grateful!!!
this is the blend file I’m using: ESTEREOSCOPICO.blend (604 KB) (A,D to rotate the object and left,right arrow to move the camera).