Next I started getting funky and added a scroll.
I created the paper rolls out of rectangles copied from the parchment layer. To color and shade these rectangles, I mostly used the Quick Mask tool and Gradient Tool to make graded selections, and then adjusting the graded rectangles with Image/Adjustments/Hue-Saturation, Image/Adjustments/Color Balance, and Image/Adjustments/Brightness Contrast. I added some colors and shadows directly with the Brush Tool set to a low opacity. I then warped the edges of the rectangles using Edit/Transform/Warp to make them look like bulging cylinders.
I photographed the tops of the spindles on our four-poster bed, opened the photo in Photoshop, selected and copied the spindle tops, sized them, and pasted them behind the scroll roll layers.
I created a simple background layer grading from a blue gray with hints if purple at the top left to a teal gray at the bottom right and added texture with Filter/Texture/Texturizer, selecting the Sandstone filter.