You'd need to resize the designs to get complete designs on each area, the celtish artists were famous for filling areas with designs. They would never chop off a design or just use a cropped partial. That's a 60's (& later)designers trick. The half-circle knot design you use on the male figure, for instance, was used to fill the upper space in a capital "P" in the book of Lindisfarn (Bible) - originally only about 1/4 inch area, drawn by hand. (I do celtic tooling on leather commercially, & I've studied their arts extensively.) :-)) To get more of a real "Celtic" feel to it, study how modern Tribals have celtic tats placed. On the male, you might try to center an oval design on one or both of the thighs (front or side) or biceps, round ones on kneecaps, Circles on pecs, The half-circle you used, centered on the stomach, flat accross the beltline, arcing accross the ribcage. Perhaps a zoomorphic beast panel on each side of the mantle-lacing. Colors would tend more to earthtones. I'd consider deep goldenrod for the forground, & a deep green, or oxblood for the background. A gradient from, perhaps deep green at the top, & red-brown at the bottom might work fairly well, for the background, of the tunic, The textures you've made are very lovely, but the colors, the tie-die affect, & the lostwax White-on-dark effect of the design look more like flower power than celtic might.