Fix camera occlusion and stabilize WMO/M2 collision behavior

include/rendering/camera.hpp

@@ -41,8 +41,8 @@ private:
     float pitch = 0.0f;
     float fov = 45.0f;
     float aspectRatio = 16.0f / 9.0f;
-    float nearPlane = 0.1f;
-    float farPlane = 200000.0f;  // Large draw distance for terrain visibility
+    float nearPlane = 0.05f;
+    float farPlane = 30000.0f;   // Improves depth precision vs extremely large far clip
 
     glm::mat4 viewMatrix = glm::mat4(1.0f);
     glm::mat4 projectionMatrix = glm::mat4(1.0f);

include/rendering/camera_controller.hpp

@@ -92,8 +92,8 @@ private:
     static constexpr float ZOOM_SMOOTH_SPEED = 15.0f;  // How fast zoom eases
     static constexpr float CAM_SMOOTH_SPEED = 20.0f;   // How fast camera position smooths
     static constexpr float PIVOT_HEIGHT = 1.8f;     // Pivot at head height
-    static constexpr float CAM_SPHERE_RADIUS = 0.2f;   // Collision sphere radius
-    static constexpr float CAM_EPSILON = 0.05f;     // Offset from walls
+    static constexpr float CAM_SPHERE_RADIUS = 0.32f;  // Keep camera farther from geometry to avoid clipping-through surfaces
+    static constexpr float CAM_EPSILON = 0.22f;        // Extra wall offset to avoid near-plane clipping artifacts
     static constexpr float MIN_PITCH = -88.0f;      // Look almost straight down
     static constexpr float MAX_PITCH = 35.0f;       // Limited upward look
     glm::vec3* followTarget = nullptr;

include/rendering/m2_renderer.hpp

@@ -57,6 +57,7 @@ struct M2Instance {
     glm::vec3 rotation;  // Euler angles in degrees
     float scale;
     glm::mat4 modelMatrix;
+    glm::mat4 invModelMatrix;
 
     // Animation state
     float animTime = 0.0f;       // Current animation time