Forcefield blocks.

[TheKingOfSpace]

Function identically to PlexDoors, but are transparent and forcefield-y.

 

[MrFURB]

Oh, I'm absolutely sure we'll eventually have some sort of forcefield-y block/effect/visual eventually. It's kinda implied with the genre so much so that I'm surprised that it hasn't been tested/implemented already.
Ah well, while we're here we might as well toss out ideas. I kinda like the idea of forcefields being able to 'filter' certain things passing through, be that weapons fire but not entities, or the other way around. It'd have some neat implications with carriers/drone ships, bases, and minigames.

 

[SkylordLuke]

for now.. we have water :P

 

[Megacrafter127]

for now.. we have water :p

*gives this post a "sadly true" rating*(I wouldn't be forced to make a post for this, if it were here :P )

 

[kupu]

It's definitely on my wish list.

 

[jayman38]

Just don't use force fields in a prison. Ask Cave Johnson why. :p

http://theportalwiki.com/wiki/Cave_Johnson_voice_lines#Perpetual_Testing_Initiative

 

[Jake_Lancia]

It would certainly make fighter hangars more interesting. Make it nonphysical for players and ships, and block weapon fire, and a crazy blue block texture, and I'll be happy.

 

[TheKingOfSpace]

Should make it so you can connect groups of forcefieldy blocks to Lights, and it'll apply a tint to it so we can have all the colors.

 

[NeonSturm]

Just don't use force fields in a prison. Ask Cave Johnson why. :p

http://theportalwiki.com/wiki/Cave_Johnson_voice_lines#Perpetual_Testing_Initiative

Why can't you use both? Forcefields to protect doors from harm and maybe to protect against teleporting out.
I imagine sci-fi prison breakers can break anything but forcefields.

Do you know what is an even worse idea than to rely only on force-fields?

Making prison cells without toilet (aka BC-304-deadalus :p)