Recommendation: set Bump=1, and then adjust up or down.
Decorative glass https://3dsky.org/collection/shared/5511249 

Tinted graphite glass in a metal frame.

Set of glass partitions in a frame.
The relief is set with seamless normal bump maps, you can decrease or increase the relief of the pattern.
The size can be adjusted with tiling and mapping.
The opacity and tint of the glass can be adjusted in the volumetric scattering section.

The size of the glass in full scale is 1300x3000 mm.

Use as: glass partitions, glass panels, kitchen fronts, cabinet fronts, wardrobe front, zoning, shower partition, shower, glass curtain for bathroom|bathtub, glazing.
Patterned glass, relief glass, tinted glass, glass partition, glass panels, smoky glass, graphite glass, carved pattern, raven, checkered, in a cage, reinforced, bubbled, frosted, wavy, mesh, netted.

https://ademglass.ru/katalog/steklo/riflenoe-i-uzorchatoe/uzorchatoe-steklo/