Why is the blur effect when taking night photos in portrait mode very weak?

In darker conditions, the camera captures images with a lower signal-to-noise ratio, making it more challenging for the algorithm to accurately detect portrait outlines and apply the blur effect. To maintain image quality in low light, the algorithm will reduce the intensity of the background blur. This adjustment helps prevent excessive processing that can degrade the overall image quality.
We will continue to pay attention to your feedback and continuously optimize our shooting algorithms to provide a better shooting experience in different scenarios.