Diffirent time, same problems...

[CyanBoterham]

I'm still struggling with all these random leaks. I make 4 jumps and there is no problem at all, suddenly when i work on jump5 random leaks appear all over my map.

Here is the mapfile im working on in hammer.
https://www.dropbox.com/s/4prg8y182yjcqha/jump_buttered.zip?dl=0

[Oatmeal]

You uploaded a zipped directory link instead of your map file 

[CyanBoterham]

im dumb, this should be right

https://www.dropbox.com/s/4prg8y182yjcqha/jump_buttered.zip?dl=0

[Oatmeal]

You have func_detail brushes separating the inside of your map to the void. That creates the leak.

Make sure that all of your walls that touch the void are normal world brushes.

[CyanBoterham]

so i just make them all a func_brush and that should fix it?

[Oatmeal]

Just select the func_detail that touches the void and press on "Move to World".

Alternatively just lower the walls there until they touch the floor.

[CyanBoterham]

alrighty, thanks for the help