I'm doing some fun shader stuff, but when I call snapshot I get some strange coloring artifacts. In particular, it seems that the red channel is...stuck high, maybe?
UIImage* image = [(GLKView*)self.view snapshot];
Not sure what other code to show, because it doesn't matter if I then turn that into a JPEG and save it to the roll, or just display it in a UIImageView directly, it has a strange red tint.
Some slight chance that this question is also relevant, but it has no answers ~ https://stackoverflow.com/questions/24447265/how-to-avoid-shadows-over-the-glkview-object-in-ios
It ... actually seems to be fixed if I set the view's drawableColorFormat to GLKViewDrawableColorFormatRGB565 ... so ... could anyone explain why that might be?