Need a little perspective help

[K_G14]

So I thought this would be quite simple, but now it's driving me crazy. I'm working on a pixel art piece that uses a wall perspective like you're looking into a room (like the old zelda games). So when I skew a wall (like in my attached image) the wall behaves correctly and the horizontal lines stay at their same heights. The problem is when I need to make a piece into a trapezoid shape (also in my image) I try to use the perspective transformation, but then when I turn and place it against the other wall the previously horizontal lines have been stretched and they do not line up. So what I'm wondering is if anyone knows a way to basically pinch top two corners in to create the 45 degree angle but in such a way that the horizontal pixels do not get move up or down.

Thanks ahead of time to anyone who can offer any help with this.

 

[SCTRWD]

While transforming your shape also add some preset warp(for example Arc) with Bend set to 0,1 and H: 0, V:0

 

[K_G14]

While transforming your shape also add some preset warp(for example Arc) with Bend set to 0,1 and H: 0, V:0

That was exactly what I needed. Thank you so much!