The foyer was nothing impressive, just four plain walls with doors in them.

The plain walls display a show of art that changes every two months.

He eyed the plain white walls, set aside the candlestick.

The room had looked little different from a high school classroom, with its plain white walls and linoleum-tiled floor.

It was an office, a large room with plain walls.

Not even a painting on the plain white walls.

In another, just plain white walls with old crayon marks on them.

Nate glanced along the plain walls, then back toward the entrance.

Given the lack of work though, plain walls and such become depressing over time.

"I think there are people now who like things cozy and don't want plain walls."