How do I make this MIDGRATE see through

[Senor Cacodemon]

Can someone please help make my midgrate see through? 

[Astronomical]

Connect the 2 rooms with 1 middle sector, draw a linedef that you want as the midbars, appily it as a mid texture to both sides, and make sure both sides of the linedef have the same alignment

[xvertigox]

You need to use it as middle texture on a 2 sided linedef:

 

Spoiler

 

 

 

[Senor Cacodemon]

Thanks guys