Hi all! I've been playing around with a basic set of 3 layers and the same photo and thought I'd share what I've come up with.
For starters, I used a digital photo of a butterfly and flowers...several bright colors against a sea of green tones.
I then used the Gimp to render the photo through a copymachine filter to reduce the image to black lines on white. The more shading you have in the b&w image, the more definition you will have in the finished piece.
This is where ArtRage 2.5 comes in:
Open the photo as a base layer. Open the b&w image as another layer. Open a third layer and cover it with some sort of coloring.....I chose a warm orange to enhance the bright reds and pinks in the photo and downplay the green. I used the metal setting cranked way up with the paint roller, paint thinned a bit to rough up the texture.
For this demo, the base photo is left as is. The b&w layer is set to shadow. The top tint layer is set to tint.