The quest to resolve the fundamental incompatibility between General Relativity and quantum mechanics has historically centered on the nature of time. In the classical relativistic paradigm, time is treated as a primary, dynamic dimension—a constituent of the four-dimensional spacetime manifold that warps in the presence of mass and energy. However, the persistence of the "problem of time" in quantum gravity, most notably manifested in the Wheeler-DeWitt equation where time vanishes from the universal wavefunction, suggests that the temporal dimension may not be fundamental. The Spacedepth framework proposes a radical ontological pivot, positing that the primary dimension of the universe is not a temporal-spatial hybrid, but a structural property termed "spacedepth". Within this architecture, time is reclassified as a derivative artifact—a local illusion emerging from the modulation of physical processes by the varying gradients of a fundamental depth-field. By replacing the temporal-centric substrate of General Relativity with a medium-based physics, the Spacedepth framework offers a unified explanation for relativistic phenomena, resolves long-standing thermodynamic paradoxes, and reinterprets the "dark" sectors of cosmology as structural features of the universal medium.