The body's metabolism and respiratory systems can be modified to harmonize with an alien planet's environment and climate. The process takes place over several days in a specially equipped Maquillage chamber.
The body's external appearance can be changed to match that of a local native. Sounds painful, doesn't it? Well, there are limits. You can't grow extra limbs, for example, and in fact the process only works with species that are close to human in their skeletal structure. In the case of Prosperine and the Avanauri, Hickory, Gareth, and Jess had all their body and facial hair removed—except for your eyebrows and a strip on their skull, which was styled to match the Ezekani fashion. As the tech explained, “It sounds a bit strange, but we've found that the Ezekanis are more accepting of a Castilie who wears their hair in a Mohawk like they do.”
Skin can be dyed any color and is usually impregnated with a radiation screening agent other substances to protect the individual from any harmful effects from exposure to the planet's sun. The medicos can do a lot with eyes, for example pupils can be enlarged or made small, and colored any shade desired. In Gareth's case, because he is male, his eyes were made emerald green and the ridges over his eyes were made more prominent.
Modifications to internal organs are more complicated. They also take longer to synthesize, and to get used to.
The procedure is done under a general anesthetic, using a range of robotic arms for precision and speed. You don't want to be awake when it's happening! Thank God they anesthetize us... was Hickory's last thought.
Medical bots are introduced through ear canals and immediately go into action to enable human lungs to process toxic air which would normally prove fatal to a human. The stomach can be modified to allow consumption and digestion of local food. Lastly, the body's immune systems are boosted to cater for any unwanted side-effects. When complete, the micro-machines naturally exit their bodies and final testing is carried out to make sure all the changes work effectively.
How Long does the Maquillage last?
The body will have absorbed a lethal dose of radiation within thirty-four days and the implants will begin to break down and release toxins into the bloodstream after thirty-six days.
Fortunately, a booster can be given any time up to the twenty-eighth day which will extend the life of the maquillage for another month.
If you have to stay on the planet longer than that, you'll need to be re-humanized on Earth before you can go through the process again.