If there's a seam I am not noticing it. The colors are fine to me. You would get more of the 'computer screen glow' if you did it digitally as 'overlay' rather than watercolor, that might be what's throwing you off, the expectation of the luminescence that's not going to be present in the gentler media? This one is really scratching my 'Star Wars' itch though, that bay of x-wings is delightful.