Who says they've got to be invisible? As far as I'm concerned, Oxygen is colorless but it appears light blue in-game.

As far as I'm concerned, I think that they should do something other than be new photons.
Such as detonate nuclear/flammable/explosive elements, cancel out spark, or maybe even have them flash different colors based on Newtonian Gravity (I.E., GRAV for Newt. Gravity)
As for uses for these:
A radio signal that does not require WIFI, wires, PRTI/O, PLSM, FIRE, or anything else in any other way (Combining Gravity pump with PCLN to create a pulse)
A remote shut down switch. You can also reverse the effects for PSCN/NSCN. Where an incoming spark will cancel on NSCN, and a wave will generate a spark on PSCN. Useful for randomization and remote shut-offs in a unique way.
A new way to create those rainbow swirlies you love so much, Cate.
@_@

TL;DR: There are uses for this that I (believe) are feasible and useful.

@Catelite (View Post)
Well in the recent update, pipe seems to do the job pretty well, for example

Isn't tpt C++ coded from the begining .___.

@lillepallt (View Post)

I hope they make it in c++ one time but I can also live with c code also would make it a lot of work to recode it.

@lillepallt (View Post)
@airstrike52 (View Post)
@disturbed666 (View Post)
@Lynxrufus (View Post)
You do realise this this thread has been bumped from back in july right? and for a reason too -- are you purposly ignoring @m_shinoda's post, it pretty much sums up this thread. please >_>