Zero-G system

I am seriously searching for a way to make a decent "zero-g" system, you know, when you can "swim" in the air. That's for a special TC i have in mid sice 2 years ago.
By now, i tried with func_gravity (not suitable since simply lows the gravity) and sv_gravity, wich doesn't allow you to move in every direction, but just on the standard XY axis, so setting it to 0 makes you jump infinite distances until stucking onto the ceiling.
I was thinking simply placing the player into water, but an invisible water(both from inside and outside) with special phisics like low resistance ecc.. but really don't know how.
Or i need to modify the source codes..don't know O_o
Anyone has some ideas/suggestions?

Thanks for the help! :smile:

Fill with water that has the no draw texture (guessing with the no draw texture - does water only work with certain textures? - here) and a trigger_playermovement to twiddle with the speeds

I imagine you will need to code this in, which shouldn't be an issue if
you are making a TC anyway since you will certainly need a programmer
for such a task.

May sound strange, but i simply don't know nothing about c++ class programming. I really can't know similar thinks, at my age.
I am just searching a way to demonstrate tis conversion is possible and show the thing to a certain group of people. If the result will be good and shown in the right way, programmers will pop up from everywhere..

Well, i tried with that trigger_playermovement but nothing happens. Effectiveli i don't see any attribute there to twiddle player movements. I tried turning off smartedit and putting something like "sv_accelerate" value=1 but nothing happens in the game (checked the "everything" flag)
is there a way to make an entity to change all these variables at the start of the game? already read in a similar topic to use a point_servercommand but again nothing happens...