I understand that transparency isn't supported for normal shapes (although it would be nice!).
However, group shapes are transparent by default (see node below), and can be set to a color (see database below), but setting the color to transparent results in even the group shapes being painted white (see cloud below).
@startuml
skinparam backgroundColor silver
'skinparam nodeBackgroundColor
skinparam cloudBackgroundColor transparent
skinparam databaseBackgroundColor yellow
node "Group mode node" {
nodesimplenode
node multilinenode[
= Multi-line node
More detail goesherea
]
}
cloud "Group mode cloud" {
cloudsimplecloud
cloud multilinecloud[
= Multi-line cloud
More detail goes here
]
}
database "Group mode database" {
database simpledatabase
database multilinedatabase[
= Multi-line database
More detail goes here
]
}
@enduml
