ADD: Receiver plane depth bias

src/core/config.h

@@ -19,7 +19,7 @@ inline constexpr float kShadowCascadeRadiusScale = 1.1f;
 inline constexpr float kShadowCascadeRadiusMargin = 10.0f;
 // Clipmap shadow configuration (used when cascades operate in clipmap mode)
 // Base coverage radius of level 0 around the camera (world units). Each level doubles the radius.
-inline constexpr float kShadowClipBaseRadius = 30.0f;
+inline constexpr float kShadowClipBaseRadius = 20.0f;
 // When using dynamic pullback, compute it from the covered XY range of each level.
 // pullback = max(kShadowClipPullbackMin, cover * kShadowClipPullbackFactor)
 inline constexpr float kShadowClipPullbackFactor = 2.5f;   // fraction of XY half-size behind center

src/scene/vk_scene.cpp

@@ -157,7 +157,7 @@ void SceneManager::update_scene()
             const glm::vec3 eye = center - L * pullback;
             const glm::mat4 V = glm::lookAtRH(eye, center, up);
 
-            const float zNear = 0.1f;
+            const float zNear = 0.2f;
             const float zFar = pullback + cover * kShadowClipForwardFactor + kShadowClipZPadding;
 
             const glm::mat4 P = glm::orthoRH_ZO(-cover, cover, -cover, cover, zNear, zFar);