You make yourself - including clothing, armor, weapons, and equipment - look different. You can seem 1 foot shorter or taller, thin, fat, or in between. You cannot change your creature type (although you can appear as another subtype). Otherwise, the extent of the apparent change is up to you. You could add or obscure a minor feature or look like an entirely different person or gender.
So, as the spell is written, it means an Aasimar could disguise itself as a Succubus, or an Oread could look like a tiefling? Is there any restriction on appearing as an outsider with multiple types? What happens if a Native Outsider tries to disguise themselves as an invisible stalker? Do they just take the form of a visible invisible stalker?
