Image Tag Alias

"Image Tag Aliases" are generally used to let the game choose images that aren't quiet perfect, but good enough.
An alias is added by the Image Functions > addImageTagAlias(Original Type Table , Alias Type Table , Priority Type Float ) function, which takes in three arguments:

Example:

game.addImageTagAlias({ outfit = "lifeguard swimsuit" }, { outfit = "swimsuit" }, 0.9)

This example adds an alias for "outfit=lifeguard swimsuit". Now every time the game looks for an image with that tag it will also consider images with "outfit=swimsuit". It will only choose those images if there are no images with the original tag, because images with the original tag would have a priority of 1.0.
If an image is considered, because of multiple aliases the priorities are multiplied and therefore, if set below 1.0 which should be the default, less likely to be chosen.