Do you think there is a way to make an underwater section with infinite jumping?
not sure....just found about mods

If you are interested in underwater maps, you should check out this one. http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=864175963

Reduced gravity is certanly a thing, but I'm not sure you can pull of infinite jumping.
The closest thing I can think of would be houndreds of invisible platforms that you keep landing on and jumping of, simulating swiming.

ah, fair enough....

there is a way to get to the jumpads guarded by teamwalls. If you go from the side of the jumpad at an angle, the jumpad will still boost you.

The invisble wall in the middle is a bit to high. You could add a no-fly zone or addtional platforms.

By invisible wall, do you mean the sky limit? I want it to feel open, like it's outside, so it can't be lowered to much. I'l look in to it though. As for the jumpads, because of the way the game works, you'l sort of enter a wall if you move at it with enough speed. What happens is that you are squeezing yourself in to it, thus reaching the jumpad. But hey, if you pull of a stunt like that, whilst being shot at by the enemy turret, it's kinda impressive. And even if you manage to do it, it'l only launch you further in to enemy territory.

If the way the jumpad currently works is a problem for you, I'l fix it, but I doubt that little hitbox error has any big impact on the way the map works.

yeah, i think that just lowering it a little bit would be fine, but i can understand why you would rather have it the other way. I have been able to use the jumpad not from speed, but just by an angle. you could just make the team wall much bigger to remove any possble chance of being able to use it, as having the team wall be a bit too big wouldnt effect gameplay very much. Though these are just suggestions.