Does anyone know how to make images scale? Right now app works in full screen well but if you window it and make it smaller the background image stays full size so you just see a small section of it.
Have you tried unchecking the "Smooth" and "Preserve Ratio" boxes under properties for your image view object in Scene Builder?
I think you might need to set the BackgroundSize to something like new BackgroundSize(100, 100, true, true, true, false) to make it scale.