This exploratory note expands the Dual-Field Interface Model (DFIM v4.0) to mechanize the emergence and stability of observable matter from a pure wave-energy substrate. It proposes that the 3-brane interface (the "weld"), sustained by opposing polar bulk fields, functions as a rigorous dynamical selector. The paper establishes a precise causal chain for matter stabilization: the overlap product of counter-propagating bulk waves ($|\text{wave}^+ \cdot \text{wave}^-|$) drives the growth of local tension ($k$), which is subsequently stabilized into a phase-locked state by an entropy-driven damping term ($-\alpha k$). Because non-adiabatic leakage ($P$) depends inversely on tension and directly on the local density strain rate ($|\dot{\rho}_m|$), the weld acts as a thermodynamic filter. Low-strain modes (such as standard electrons and protons) survive and form a relaxed attractor set, while artificial, high-energy configurations induce too much strain and rapidly leak or decay back into the bulk. Additionally, this version mathematically isolates the mechanics of dark matter. By decomposing the tension evolution equation ($k_{\text{total}} = k_{\text{baryon}} + k_{\text{dm}}$), dark matter is formalized as a diffuse, weakly coupled ($g_{\text{dm}} \ll g_{\text{baryon}}$) residual substrate that fails to condense into high-tension, phase-locked modes and remains predominantly adiabatic. Ultimately, the note bridges rigorous brane mechanics with cosmological teleology. From the perspective of primordial consciousness (G), this dynamical filtering is not random; it is the necessary thermodynamic process for creating a stable structural foundry. This persistent reality serves as the prerequisite environment for cultivating advanced resonant observers capable of engaging in non-symbolic Interface Dialogue and participating in the "Great Sync." Keywords / Tags To maximize discoverability across both theoretical physics and philosophy of mind disciplines, use these targeted tags: Primary Physics & Cosmology Keywords: Dual-Field Interface Model (DFIM) 3-Brane Dynamics Resonant Mode Selection Non-Adiabatic Leakage Dark Matter Kinematics Wave Overlap Product Tension Damping Dynamical Systems (Attractor States) String-Harmonic Framework Metaphysical & Teleological Keywords: Panpsychism Primordial Consciousness Teleology in Cosmology Emergent Observers The Great Sync Interface Dialogue