Stage 2: Adobe Photoshop; filters and adjustments

Stage 3: Adobe Photoshop; splitting channels. I like my work large and with a degree of degradation. So, I split my work into color channels for further processing. Here is the red channel image:

Stage 4: Adobe Illustrator; convert the grayscale channel files into posterized vector files. Here is the red channel after processing:

Stage 5: Adobe Photoshop; Recombine "vectorized" color channels, resize to my preferred output size (58in x 36in) and further filters and processing. 

I like this process. When recombined after "vectorizing" the color channels, the vector shapes do not line up perfectly and I get all these wonderful color fringes across the piece. Depending on the subject and how I convert the channels to vector files, the fringing is sometimes more or less.