Playing Around with reflection orbs

i have a pool in my map, that comes with a big glass ceiling.
and to make it look extremely cool i want the cool lighted water to reflect in the ceiling.

for this i used a reflection orb, however they are round and the reflection that is made is also round while its a big square room and a square pool. so this looks weird
as in the attached picture

i did try to use mutiple small distance reflection orbs but they all look round and you can clearly see its not a solid reflection but it looks like mutiple mirrors/
i also tryed to give it a distance of 3000, this worked to make the reflection strait as the roundess only happents on the edge's of the orb. it also made my entire map reflect the pool on all walls, even in room cannot see the pool

so is there any way to get the reflection not round at the edges?