Hi, I am not new to iphone coding as I have one app out in the store, so I'm not a complete noob - however please forgive this question as it might be very silly... How can I prevent a partially transparent circle and a rectangle that I have drawn in quartz which overlap from 'double' drawing? By double drawing I mean the areas which overlap are shaded darker than the areas that dont overlap - because that area has been draw into twice. This wouldnt be a problem if everything is solid color, but I am trying to draw partially transparent and having areas that overlap go dark just makes no sense for my app! I really don't know a lot about drawing with a technology such as quartz as I have never really done it before - but I feel like is probably a common problem. Is there a function or concept in quartz that I should be using to do this? Any help would be very appreciated! Joe.