Though difficult to achieve, realistic shadows and highlights can now be used with Meta's Passthrough Relighting technology. This feature allows developers to easily match the light of the virtual world with the real environment. It seamlessly integrates digital objects with the real environment. However, Meta's passthrough relighting technology has seen both challenges and advancements. While current iterations have been criticized for their limitations, the company's ongoing research and development efforts are evident. This can be seen in recent prototypes like Flamera and Butterscotch. Such prototypes signal a promising future for more immersive and high-fidelity passthrough experiences. With a focus on innovation and user feedback, Meta is also poised to make significant strides in passthrough technology.