It snowed Friday night at the Tobin Center for the Performing Arts — at least soap-bubble flakes were flying off the roof. But the annual popular San Antonio Symphony Holiday Pops concert inside covered far more ground for the near-capacity audience of about 1,500 people. Global mezzo-soprano star Catherine Martin, the Mastersingers, a wide-ranging program and Santa Claus combined for a “Wonderful Life” evening of music for the audience, which also joined in the music-making with a sing-along of carols. A highlight was a suite from Dimitri Tiomkin’s score for the famous holiday-themed movie, “It’s a Wonderful Life,” some of which was not used in the film. The orchestra, Martin and the Mastersingers joined for an “Auld Lang Syne” to remember, recalling the movie’s Christmas Eve finale.