The project aims to develop a theme that is currently underdeveloped in the field of virtual and augmented reality. The aim is to propose visualization techniques for mixed reality adapted to spatially complex learning tasks. This objective is first of all part of a methodological approach aiming at exploring the different types of possible representations, based on perceptual evaluations and metrics. However, this preliminary work also aims at proposing specific evaluations for certain learning tasks, allowing to facilitate the design of mixed reality applications adapted to this use case.