How did P. V. Janakiram create the pictorial sculpture of Ganesha?

NCERT (2026-27): “Ganesha This is a sculpture in oxidised copper made by P. V. Janakiram in 1970, and is in the collection of NGMA, Delhi. He has used sheets of copper to create pictorial sculpture as free-standing forms, and ornamented their surface with linear elements. Metal sheets are beaten into concave planes on which are welded linear details. These linear elements work as facial features and decorative motifs to suggest religious icons, inviting intimate contemplation.”