GR translation: marble carried to a wildness of white billow and candescence

[Mike Jing]

V725.29-36, P740.4-11   well, he was a habitué of mercury fumes in moderate
doses, he felt it did his brain some good, and that may account for
pictures like “Der Raketen-Stadt”: it shows, from a height that is
topographically impossible in Germany, the ceremonial City, fourfold as
expected, an eerie precision to all lines and shadings architectural and
human, built in mandalic form like a Herero village, overhead a magnificent
sky, marble carried to a wildness of white billow and candescence . . .

The phrase "marble carried to a wildness of white billow and candescence"
is a metaphor used to describe the "magnificent sky", is that correct?  The
published translation interpreted it as actual marble in the city, which
seems wrong to me.