Living decoration

Living decoration is a name for certain bacteria that the Homelanders use to decorate their bodies.

Overview
The Homelanders make a large variety of goodies, used to decorade their hardware in everyday life. They are commonly made of SCS materials, though some of them made of ceramics, various minerals and synthetic fibers.

When biotechnology had advanced to the level when it became possible to genetically alter and even produce living organisms with required properties, the Homelanders decided to use it to produce living decorations for their hardware, because of numerous advantages like simple maintenance, lack of external parts and some others.

They used the bacteria that are able to produce bioillumination, like the moss the Homelanders use to illuminate their houses.

Variety
Bacteria come in a wide variety of colors and intensity of luminosity, allowing each Homelander to choose their unique decoration.

They can be used as composites with several types of bacteria combined in an arbitrary order, offering even wider range of choice.

Complications
Bacteria is required to be in a commensalistic type of bio relationship with a Homelander's skin, so the latter won't be damaged or harmed in any other way. Only some types of bacteria match this requirement, while the others can be used as living decorations only in a parasitic type of bio relationship.

They are used nonetheless, usually after tweaking a regeneration system so it'd address problems that arise from this interaction.

Another complication is a usage of such decorations in a hazardous environment, such as vacuum, fire, high pressure and so on. Chemical bonds reinforcement is commonly used to protect bacteria from harm.

Possible development
Some Homelanders have suggested a project that could lead to the total skin replacement with the specially developed type of bacteria, making it dynamic and easily modified. The nutrition liquid vessels should be integrated with the bacteria, which would require toxic protection of the latter.