Episode #15 — pure 4DGS narration, no 2D paste-back
Pivot per «только 4D» directive: pure 4DGS narration format вместо LatentSync paste-back talking-heads. Source = 16-sec orbital 4DGS hybrid render + Fish Speech voice + Hunyuan-Foley ambient. NO LatentSync, NO 2D paste-back. Frontier-true 4DGS-only. До FLAME/BFM owner unblock — формат narration over 4D scene остаётся primary content shape.