[NineBreakerFan]

Is it possible to have a 3x3 wall? or are they fixed to 1x1?

[Daedalus]

They are supposed to be 1x1 afaik

[AlliedG]

besides it would clog up the AI base,

a 3x3 wall could just be a non-c4 able concrete structure i.e. a hedgehog.

[Marshall7a]

Structures can be shot through, unlike walls.

[cabal 901]

That would be cool though

[AlliedG]

well it would be logical for lasers or shells to just bypass such defences but it would slow down enemy movement or whatever.