Structure:** 300m black/purple crystal pyramid surrounded by permanent sandstorm (particle effect). - **Details:** - Walls with glowing blue ancient symbols (emissive texture, RGB 0,0,255). - Defenses: Crystal sniper towers (modular meshes), collapsing bridges (rigged break animation every 5 mins). **Technical Specs:** - **Modular Design:** Separate meshes for towers/bridges/symbols. - **Textures:** Reflective crystal (RGB 30,0,50 for black; 150,0,150 for purple). - **Tags:** "modular fortress", "sandstorm environment". **0.5cm gaps** between bridge segments to prevent clipping