Body perception is not fixed but continuously updated through sensory and motor signals. Building on neuroscientific, HCI and AI research, our lab investigates Body Transformation Experiences — perceptual illusions in which altered sensory bodily feedback induces feelings of one’s body changing. In this paper we introduce two paradigms and prototypes which use sound and movement signals and are designed for foot augmentation, along with experimental results from various application contexts. By presenting these paradigms and experimental findings, this paper aligns with the workshop themes of “modalities and methods for foot augmentation” and “design challenges and guidelines”, contributing insights into how multisensory feedback can reshape body perception and movement behavior.