Some simple steps to adding texture to your avatars in procreate!
Step One: Create a new layer on top of your avatar
Step two: Goto "actions" [ the wrench icon ] "add" and "insert a photo. This will automatically take you to your photo library, choose the texture u have saved and it will upload into your picture
Step Three: [ How to get the texture to overlay onto your avatar? You are going to go back to your layers, tap with the layer that has the texture [ make sure the texture layer is ABOVE your avatar layer] a menu will pop up .... tap "clipping mask". This will overlay your texture!