MADrive enhances scene reconstruction for autonomous driving by integrating visually similar 3D car assets from an external memory bank to achieve photorealistic synthesis of altered scenarios.
Recent advances in scene reconstruction have pushed toward highly realistic
modeling of autonomous driving (AD) environments using 3D Gaussian splatting.
However, the resulting reconstructions remain closely tied to the original
observations and struggle to support photorealistic synthesis of significantly
altered or novel driving scenarios. This work introduces MADrive, a
memory-augmented reconstruction framework designed to extend the capabilities
of existing scene reconstruction methods by replacing observed vehicles with
visually similar 3D assets retrieved from a large-scale external memory bank.
Specifically, we release MAD-Cars, a curated dataset of {sim}70K 360{\deg}
car videos captured in the wild and present a retrieval module that finds the
most similar car instances in the memory bank, reconstructs the corresponding
3D assets from video, and integrates them into the target scene through
orientation alignment and relighting. The resulting replacements provide
complete multi-view representations of vehicles in the scene, enabling
photorealistic synthesis of substantially altered configurations, as
demonstrated in our experiments. Project page:
https://yandex-research.github.io/madrive/
