ima make that

And yes - they are fences.

TBH, I didn't play Terraria for quite some time... But if my memory serves me right (and I also checked the wiki): for screens in the house - pearlwood, and for bamboo - shadewood with paint (and hammered leaf block for leaves on it).

I am trying to make a build like this sin a similar theme and was wondering what type of wood the fences are, or if they are fences or not

I KNOW about Photoshop - but I don't HAVE it. And probably never will - I don't need it on a day-to-day basis or even just more than once on a blue moon, so not willing to pay for it nor pirate. Can the "fixing" be done with some other program? Most likely. Do I care? Not - this was made to show a build in Terraria, not my familiarity and skills with some other program.
BTW - this pic is 3 y.o. at the moment. And now it's possible to make snapshots in Terraria without a need to stitch pieces together, so the point is mute. ;P

This guy don't know about Photoshop and how to fix background

His background isn't messing up, this is multiple pics stitched together.

love it <3

Your bakround is messing up