  The tactile sensation of stroking soft fur, known for its comfort and
emotional benefits, has numerous applications in virtual reality,
animal-assisted therapy, and household products. Previous studies have
primarily utilized actual fur to present a voluminous fur experience that poses
challenges concerning versatility and flexibility. In this study, we develop a
system that integrates a head-mounted display with an ultrasound haptic display
to provide visual and haptic feedback. Measurements taken using an artificial
skin sheet reveal directional differences in tactile and visual responses to
voluminous fur. Based on observations and measurements, we propose interactive
models that dynamically adjust to hand movements, simulating fur-stroking
sensations. Our experiments demonstrate that the proposed model using visual
and haptic modalities significantly enhances the realism of a fur-stroking
experience. Our findings suggest that the interactive visuo-haptic model offers
a promising fur-stroking experience in virtual reality, potentially enhancing
the user experience in therapeutic, entertainment, and retail applications.
