Hi,
there is a custom action to take camera screenshots: TakeCameraScreenshot
have a camera setup to use your renderTexture, and then you can save it using the action above.
Save it in your persistentDataFolder, if you want your user to be able to access them later.
you'll find also custom actions to work with the persistentFolder. you'll likely want to be able to list available files, but of course it's best to know what you have there, and maybe save references in the playerprefs for the images path.
you can then load these images as sprites using the custom action "SetSprite", for this you need a fsmObject Variable of type Sprite.
Bye,
Jean