Though Brian Wilson was one of pop’s most studied artists, he largely remained an enigma. The Beach Boys leader, whose death at 82 was announced this week, made music for the masses with an artisan’s eye for detail. While his biography was well known, questions about what drove him to the top of the charts — and ultimately deep into darkness — could never definitively be answered.

Since the start of the CD era, Wilson’s legacy has been burnished by a series of deep-dive archival efforts, including the 1993 “Good Vibrations” boxed set, the revelatory “Pet Sounds Sessions” collection from 1996, a series of early 2000s reissues focused on the band’s Brother label years, and ultimately the holy grail: the release of his abandoned mid-60s masterwork, “Smile,” in 2011.

“Everything Brian created is worth hearing and it all has a kind of historical value in terms of understanding his life,” said David Leaf, the Beach Boys historian who published “Smile: The Rise, Fall & Resurrection of Brian Wilson” this spring.

In more recent years, that effort has continued with sets focused on the Beach Boys’ overlooked and often deceptively strange 1970s work. “These projects continue to come out with all this new and unheard material,” said the author Peter Ames Carlin, who wrote a 2006 biography of Wilson, “Catch a Wave.” “It’s a testament to just how creative and prolific Brian was — despite the many ups and downs of his life.”

Even with the consistent release of music from the vaults, there are fascinating corners of Wilson’s oeuvre that have yet to see the light of day. Here’s a rundown.