Hot-melt glass 

is also known as crystal three-dimensional art glass or fusible pattern glass. Hot-melt glass belongs to glass thermal processing technology, that the

flat glass is melted and recessed into a pattern mold.

Figured glass

also called patterned glass, one type of the decorative glass,obscure glass.

--was produced by rolling the textured pattern  onto one side of a sheet of molten glass,as it cooled, leaving a permanent imprint behind.

 The result was a patterned surface that reduced transparency, yet didn't diminish the passage of light.