I am utterly lost when using 9-slice scaling. My main confusion is with the X0,X1,Y0,Y1. I thought it was like region 2 where you gave 2 points to make a box but anytime I put the number of pixels it went wak,
It specifies the position of the lines if you were to split the image into nine:
X0 and X1 are both measured from the left edge, in pixels.
Y0 and Y1 are both measured from the top edge, in pixels.
If you want to have a 180x180 box in each corner, you need to have X0 and Y0 as 180 each, and X1 and Y1 as your full size minus 180:
X1 = 1632 - 180 = 1452
Y1 = 732 - 180 = 552
Note: Your image may be too large. I believe the max image size for Roblox decals/images is 1024 in each dimension. You may need to scale down and recalculate the numbers based on the new size.