The HDR (High Dynamic Range) effect on the Redmi A3 falls short of expectations due to several factors:
1. The effectiveness of HDR largely depends on the quality of the display. If the screen has lower peak brightness or poorer color accuracy, the HDR effect will not be as pronounced;
2. The device's hardware, including its processor and GPU, plays a role in rendering HDR content;
3. HDR performance can be influenced by how well the software processes and displays HDR content. If the software optimization is not ideal, the HDR effect will not meet expectations.