A field must be felt. The SensoryTrace names the phenomenological residue through which a corpus achieves presence in experience: not as abstract structure, but as felt quality. In the Socioplastics architecture, this is the most undertheorized concept. The corpus is rich in structural analysis, scalar grammar, and conceptual architecture. But it has almost no theory of how the field is experienced. The SensoryTrace addresses this gap. It asks: what does it feel like to navigate the Socioplastics corpus? What is the affective quality of moving from Node 0001 to Node 3000? What is the sensory texture of a CamelTag? What is the embodied experience of reading a decalogue protocol? These are not trivial questions. A field that cannot be felt cannot be inhabited. The SensoryTrace is the concept that makes the corpus inhabitable. It identifies the traces: the rhythm of the numbering system, the visual density of the blog format, the tactile quality of the DOI as a fixed anchor, the spatial experience of moving between Tomes. Node 2999 places this concept near the closure of Core VI because sensory presence is the final condition of executive operation. Before a field can govern, deploy, or execute, it must be present. The SensoryTrace is what makes it present. Without this concept, the field is a structure without a body. With it, the field becomes a space to be inhabited.