Just as you would adjust saturation, you should also fine-tune sharpness to match the viewing distance. You can produce striking prints without letting the paper texture obscure fine details—for example, by slightly reducing sharpness for smooth and glossy RC paper, or increasing sharpness for less-reflective matte paper.
Additionally, by using the Chroma Optimizer featured in the pigment-based PRO printers, along with multiple black inks, you can achieve prints that convey a sense of luxury and depth.