Subterranean Pyramid in a 3D Tunnel Render

Ultra-detailed photorealistic 3D render of a massive ancient pyramid embedded within a maze of damp underground tunnels. View from a low, side angle along a rough-hewn tunnel; at the end, a wide cavern reveals the towering pyramid with weathered limestone blocks, moss, and subtle glyphs. Tunnel walls are jagged stone with mineral veins, wet sheen, and rusted iron supports. Warm torchlight along the walls casts amber pools and long shadows, while cool light leaks from cracks above, creating volumetric fog and drifting dust motes. The pyramid stands upright, slightly cracked, with a faint inner glow emanating from hidden inscriptions. A reflective pool on the tunnel floor mirrors the pyramid and the ambient light. Use high-detail PBR materials, ray tracing, depth of field, and cinematic post-processing for a 4K realism, with a mysterious, epic, and slightly claustrophobic mood.