Opacity: opacity on group
Opacity2 : opacity on group
opacity:1
stroke-opacity:1 fill-opacity:1
opacity:0.5
stroke-opacity:1 fill-opacity:1
opacity:1
stroke-opacity:0.5 fill-opacity:1
opacity:0.5
stroke-opacity:0.5 fill-opacity:1
opacity:1
stroke-opacity:1 fill-opacity:0.5
opacity:0.5
stroke-opacity:1 fill-opacity:0.5