I photographed the work and played with it in a sketch program until I was happy with the direction.
Opaque white glass outlines and accents the flower petals.
the leaves and lily pads got treated to some translucent green glass.
Clear tempered glass filled in the petals, leaves, and lily pads.
Then the background was worked in a clear window-type glass in a pattern I like to call a feather cut. The look is achieved by making shallow cuts along the outer edge of the piece of glass with a dual-wheeled glass cutter
Next: Part 3--Grouting.