diff --git a/Engine/Graphics/3DRenderer.cpp b/Engine/Graphics/3DRenderer.cpp
index 6851577..b7bb07c 100644
--- a/Engine/Graphics/3DRenderer.cpp
+++ b/Engine/Graphics/3DRenderer.cpp
@@ -283,8 +283,8 @@ float Graphic3DRenderer::ComputeSGRatio() {
         // The triangle made by the ground plane intersection with the frustum. This intersection
         // cross the far plane at some point. Instead of computing the coordinate of the point, we
         // directly use the far plane length to get the corresponding ratio for the screen.
-        sgRatio = -(altitude * fovCos - mMainCamera->GetFarZ() * fovThetaSin)
-                / (2.f * mMainCamera->GetFarZ() * fovSin * thetaCos);
+        sgRatio = -(altitude * fovCos - 1000.f * fovThetaSin)
+                / (2.f * 1000.f * fovSin * thetaCos);
     }
 
     // Clamp
diff --git a/Engine/Graphics/Camera.cpp b/Engine/Graphics/Camera.cpp
index 86716ff..ab99709 100644
--- a/Engine/Graphics/Camera.cpp
+++ b/Engine/Graphics/Camera.cpp
@@ -8,7 +8,6 @@ Camera::Camera() {
 void Camera::SetFrustrum(float fov, float r, float zn, float zf) {
     //if (!frameDirty)
 	this->fov = fov;
-	this->zf = zf;
     M3D_MATRIX pMat = M3D_TransformMatrixFrustrumFovLH(M3D_Deg2Rad(fov), r, zn, zf);
     M3D_V4StoreF4x4(&mProjMat, pMat);
 	frustrumUpdated = true;
diff --git a/Engine/Graphics/Camera.hpp b/Engine/Graphics/Camera.hpp
index 7f3f2d1..72e800a 100644
--- a/Engine/Graphics/Camera.hpp
+++ b/Engine/Graphics/Camera.hpp
@@ -14,7 +14,6 @@ public:
     Camera& operator= (Camera const&) = delete;
 
     float GetFoV() const { return fov; }
-    float GetFarZ() const { return zf; }
     const bool IsFrustrumUpdated() const { return frustrumUpdated; }
     const bool IsCameraMoved() const { return camMoved; }
     M3D_VECTOR GetPos() const { return M3D_V4LoadF3(&mPos); }
@@ -45,7 +44,6 @@ public:
 
 private:
     float fov;  // It's the Y-FoV!
-    float zf;
 
     bool frustrumUpdated = true;
     bool camMoved = true;