Hi I am using Affinity on my iPad, I am trying to follow the "replacing sky" tutorial. I am new to this. My grandson wanted his toys with sky behind them. When I use the Smart Selection brush it misses some of the parts I want to select. When I use the Refine Selection Tool it removes even more making it worse. Is there another way to make the selection edge go where I want it to go? I have attached a photo of my iPad as I didn't know how to attach the photo showing the areas not selected.