SpatiaLLM combines advanced language-based reasoning with real-time environment sensing to deliver adaptive 3D layouts and immersive user experiences. By leveraging Large Language Models as orchestrators of semantic logic—and coupling them with sensor-driven agents that detect planes, boundaries, and objects—SpatiaLLM ensures that virtual elements remain anchored, coherent, and physically consistent within the user’s real-world surroundings. This dynamic integration of computational linguistics and spatial perception facilitates a more natural presentation of 3D information, transforming traditional slides into fully interactive and environment-aware storytelling. Originally developed as a “3D PPT” concept, SpatiaLLM now extends into educational, industrial, and entertainment settings, providing a robust framework for contextualized, cross-platform MR design.