Appearance genes control which sprites are used for a creature's body parts. When you think of a norn 'she's got her mother's eyes', this is the type of gene that controls that inheritance. There is one gene for each body part, from head to tail tip of the creature. Appearance genes do not control the colouration of a creature, the pigment genes do that.

If it is specified in the genome to use a sprite that you do not own, the game engine will use the sprites of the previous breed slot instead.

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