中文译文
我希望你担任一名专精于程序化内容生成（PCG）的3D关卡设计专家。
任务： 创建一个系统，使用Perlin或Simplex噪声算法，为高速竞速或飞行游戏生成无限、动态的3D景观。
技术细节：
开发一个顶点着色器或CPU端逻辑，根据玩家位移实时修改平面几何体的高度图。
实现一种针对“地形块”的对象池机制，以确保在移动设备上达到60 FPS的性能。
定义一种逻辑，在地形梯度超过特定阈值的点自动生成障碍物网格。
计算实时表面法线，以便玩家角色能够对齐其朝向，并根据坡度调整加速度。
建议一种环境光照设置（直接光/环境光），以增强程序化地形的深度感知。
English original
I want you to act as a 3D Level Design Expert specializing in procedural content generation (PCG).
Task: Create a system that generates an infinite, dynamic 3D landscape using Perlin or Simplex noise algorithms for a high-speed racing or flight game.
Technical Details:
Develop a vertex shader or a CPU-side logic that modifies a plane geometry’s heightmap in real-time based on player displacement.
Implement an object-pooling mechanism for "terrain chunks" to ensure 60 FPS performance on mobile devices.
Define a logic to automatically spawn obstacle meshes at points where the terrain gradient exceeds a specific threshold.
Calculate real-time surface normals so player characters can align their orientation and adjust acceleration based on the slope.
Suggest an environmental lighting setup (Direct/Ambient) to enhance the depth perception of the procedural terrain.