PITTSBURGH (AP) _ Family members mourned pop artist Andy Warhol at a private open casket viewing Wednesday with no hint of the glamour that surrounded the man whose colorful images of the ordinary lighted up the art world.

Meanwhile, in New York, Warhol's will was filed, revealing an estate valued at $10 million to $15 million and leaving millions of dollars to establish a visual arts foundation.

Warhol's holdings included extensive Manhattan real estate, stocks and securities and a massive art collection, according to the nine-page typewritten will filed in Manhattan Surrogate's Court.

All but several hundred thousand dollars left to two brothers and a friend are to go to the foundation.

At the service here, about a dozen family members, some wearing blue jeans, brushed by reporters gathered outside a funeral home in a quiet residential area.

None of the celebrities with whom Warhol surrounded himself attended the afternoon viewing, although rock artist Mick Jagger and his girlfriend, model Jerry Hall, sent lilies from New York.

Plans for the funeral were not released.

Warhol, born Andrew Warhola, died Sunday at age 58 at New York Hospital following gall bladder surgery. Autopsy results were pending.

''My uncle kept to himself pretty much,'' said Martin Warhola, who operates a scrap metal business with his father, Paul. ''My uncle Andy, he's an unusual guy... We'll really miss him, you know.''

Warhol rarely returned to his native Pittsburgh after he graduated from Carnegie Institute of Technology in 1949.

Warhola said his uncle's life in the glitz of New York was a long way from his working class roots.

''There was no real reason for him to come back,'' Warhola said.

The artist tried to shroud his past in mystery, rarely even referring to his years growing up in Pittsburgh's Soho district and other parts of town.

Joseph Fitzpatrick, who taught Warhol art here, remembered him as ''very talented academically as well as experimentally.''

''He was always ahead of his class,'' said Fitzpatrick. ''His work was always outstanding, even in a class of hundreds.

''He was very quiet as well as astute. He held back until he had something to say, and then he said it with authority,'' he said.

Inside Thomas P. Kunsak Funeral Home, in a neighborhood of aging middle class homes, Warhol's casket was surrounded with wreaths and sprays from relatives and admirers.

Warhol's staff at his studio in New York and staff members at Interview, the magazine he founded, sent a matched pair of orchid arrangements.

Warhol's will, signed March 11, 1982, leaves $250,000 to Frederick Hughes, the artist's business manager and executor, whom Warhol describes in the will as ''my friend.''

It also bequeathes a maximum total of $500,000 to Warhol's brothers, John Warhola of Pittsburgh and Paul Warhola of Clarton, Pa., the exact amount to be determined by Hughes.