Read this https://blog.halide.cam/iphone-xs-why-its-a-whole-new-camera-ddf9780d714c. maybe also consider getting an app like halide.
short version: the smoothening is a consequence of the smart HDR. the camera now takes pictures at faster shutter speed and higher ISO, resulting in more noise. apple compensate by employing more aggressive noise reduction, but the tradeoff is a smoothened effect.
short version: the smoothening is a consequence of the smart HDR. the camera now takes pictures at faster shutter speed and higher ISO, resulting in more noise. apple compensate by employing more aggressive noise reduction, but the tradeoff is a smoothened effect.