The most reliable mod for changing character appearance in Starbound is or "Appearance Gun" (from the workshop), but if you want a simple self-made version that lets you change appearance via a craftable item:
If you prefer not to install mods, you can manually edit your file using Starbound's built-in utilities. Steam Community Guide :: Starbound: Character Re-customization. starbound change character appearance mod
"itemName": "appearancegun", "rarity": "legendary", "category": "tool", "price": 0, "description": "Right-click to change your character's appearance.", "shortdescription": "Appearance Gun", "inventoryIcon": "flashlight.png", "tooltipKind": "gun", "altAbility": "name": "openCharacterCreation" The most reliable mod for changing character appearance