"seamless mastery" is a correct and usable phrase in written English.
It is typically used to describe a high level of skill or proficiency that appears effortless and flawless. Example: The musician's performance was a display of seamless mastery, as she effortlessly navigated complex melodies with perfect precision.
Multiplayer is much, much better – indeed, pro gamers and YouTubers are already saying it's the best multiplayer since Black Ops 2. Treyarch has created a glorious movement system which gives you seamless mastery of your environment.
"New and emerging" is a synonym for computer-based work and the two heads, one covered by fingerprints the other by reproductions of a driver's license, confected by Allen Cosgrove of Asbury for his "I.D. Series" show a seamless mastery of the medium.
SERGEI EISENSTEIN'S first feature, "Strike" (1925), doesn't demonstrate the seamless formal mastery that would define his second and more celebrated film, "Battleship Potemkin," released the same year, but that's not necessarily a bad thing.
Reading this novel is like watching an Olympic athlete about to win the gold: the seamless flow of action, the mastery of technique, seemingly effortless yet demanding attention and eliciting admiration as an end in itself.
A seamless packing-tape rendering of a multi-colored oriental rug mimics a mastery in stained glass in its display of vibrancy and dimension.
Now he has achieved near mastery of style: language, plot, characterization and theme mesh with a seamless power and without the sardonic glibness ("I hope that's the punch line. 'Cause this best be a joke") that made his previous books, in the end, minor.
The mastery with which he employs these techniques, however, make for hyperrealistic seamless "human" creations.
Long's aria is notable for its seamless mixing of Asian and Western stylistic elements; Barber's opera, for the distinctive curvature of its melodies, its mastery of English prosody, and the sophisticated richesse of its orchestration; and Menotti's for the sheer dramatic impact of its content.
