Question about wallpapering

[Fimbulvinter]

I'm trying to wallpaper the top level of my townhouse, but there is one segment of wall that I just can't seem to reach. The one directly behind the stairs.



Is there a way to get to that spot; a sweet spot I need to find, or will that one segment be bare forever?

[Pildream]

try the side of the stairs

[vilkin]

try from here

[Fimbulvinter]

Found the spot.
Took many tries and some pixel perfect placement, but it's done.