Target Tracking from Gallery Texture

Has anyone been able to get target tracking to work when the texture is a gallery texture? I tried uploading an album cover from my gallery and the tracking didn’t work. But if I use that same image file as the texture for target tracking it works.

@andrewcolabella that will not work . even when we had external texture we cant use dynamic texture for the target tracking. so for target tracking the Image has to be in the project