See http://www.gimpusers.com/tutorials/old-pergament-paper

First, save the Scribus file as SVG. Load that as a layer in the GIMP file, removing the older text.svg layer.

1. Image:Merge visible layers. (Expanded as necessary)
2. Perform the following on the resulting layer:

	1. Filters:Noise:RGB Noise
		Independent RGB
		Red 0.2
		Green 0
		Blue 0
		Alpha 0
	
	2. Filters:Blur:Gaussian Blur
		8 px
		RLE method
	
	3. Filters:Light and Shadow: Lighting Effects
		Distance 2.000
		Light1
			Type directional
			color white
			Intensity: 1
			Position:
				X -1
				Y -1
				Z 1
			Direction:
				X -2.25
				Y 1.75
				Z 1
		Material
			Glow 0.5
			Bright 0.75
			Shiny 0.12
			Polished 20
		Bumpmap
			Channel Crinkle
			Curve: Linear
			Max Height 0.01
	
	4. Filters:Enhance:Sharpen 60

3. Image:Flatten Image.


If the size of the book changes, I also need a new crinkle channel. All layers must be the same size, or the Channel will not show up as a bump map.

1. Go to the Channels tab.
2. Create a new channel; name it "Crinkle X by Y"
3. Opacity to 100%
4. Click to make channel active.
5. Filter:Render:Clouds:Solid Noise
	Random seed 1214747118
	X: 2.3
	Y: 3.3
	Detail: 15
6. Deactive eye symbol for channel.
7. Go back to layers and select one of the layers.