Is this it?
Stippling
https://www.gge.org.uk/categories/20081010_3https://www.gge.org.uk/categories/20081010_1"In the best pieces engraved by the musician and artist Simon Whistler, who has died aged 64, the glass and the marks scratched into it seem to dissolve, leaving only the images suspended in light. He described the techniques he inherited from his father, the engraver Sir Laurence Whistler, as releasing the light trapped between the surfaces of a piece of glass.
Laurence (obituary, January 6 2001) had virtually re-invented the lost techniques of the great 17th-century glass artists, particularly stippling, a staggeringly labour-intensive technique of cutting myriad tiny marks into the glass, which can give the subtlety of pencil drawing to the brittle medium. Simon wondered if he had measured up to the genius of his father - who was in turn haunted by the brilliance of his own brother, the painter Rex Whistler, who lived fast and died young, killed in action in 1944."
"In a book published last year, On a Glass Lightly, Whistler told the story of his career in glass, accompanied by many fine reproductions of his work. He began engraving in his teens, and could not have had a more experienced teacher. Laurence Whistler was a reserved and sometimes demanding man, but this link between them was valued by both, and Simon received commissions and exposure in exhibitions even when mostly preoccupied with music.
His glass may look superficially similar to his father's, in technique and subject matter, but there are differences. Laurence considered his son to be the better stipple engraver, and Simon took immense trouble to design for the curving shape of the glass. Musical staves often feature in his work, represented with a player's understanding. Romantic landscape figured strongly on his goblets made for exhibition, including a series of 10 Welsh scenes inspired by Turner, in 1989. The landscape photography of Simon's brother-in-law, James Ravilious, in north Devon, was a source of inspiration.