diff --git a/include/omath/linear_algebra/mat.hpp b/include/omath/linear_algebra/mat.hpp
index d8fc0333..d82dea5d 100644
--- a/include/omath/linear_algebra/mat.hpp
+++ b/include/omath/linear_algebra/mat.hpp
@@ -677,11 +677,13 @@ namespace omath
                     {0.f, 1.f / fov_half_tan, 0.f, 0.f},
                     {0.f, 0.f, far / (far - near), -(near * far) / (far - near)},
                     {0.f, 0.f, 1.f, 0.f}};
-        else
+        else if constexpr (DepthRange == NDCDepthRange::NEGATIVE_ONE_TO_ONE)
             return {{1.f / (aspect_ratio * fov_half_tan), 0.f, 0.f, 0.f},
                     {0.f, 1.f / fov_half_tan, 0.f, 0.f},
                     {0.f, 0.f, (far + near) / (far - near), -(2.f * near * far) / (far - near)},
                     {0.f, 0.f, 1.f, 0.f}};
+        else
+            std::unreachable();
     }
 
     template<class Type = float, MatStoreType St = MatStoreType::ROW_MAJOR,
@@ -697,11 +699,13 @@ namespace omath
                     {0.f, 1.f / fov_half_tan, 0.f, 0.f},
                     {0.f, 0.f, -far / (far - near), -(near * far) / (far - near)},
                     {0.f, 0.f, -1.f, 0.f}};
-        else
+        else if constexpr (DepthRange == NDCDepthRange::NEGATIVE_ONE_TO_ONE)
             return {{1.f / (aspect_ratio * fov_half_tan), 0.f, 0.f, 0.f},
                     {0.f, 1.f / fov_half_tan, 0.f, 0.f},
                     {0.f, 0.f, -(far + near) / (far - near), -(2.f * near * far) / (far - near)},
                     {0.f, 0.f, -1.f, 0.f}};
+        else
+            std::unreachable();
     }
     template<class Type = float, MatStoreType St = MatStoreType::ROW_MAJOR,
              NDCDepthRange DepthRange = NDCDepthRange::NEGATIVE_ONE_TO_ONE>
@@ -717,7 +721,7 @@ namespace omath
                 { 0.f,      0.f,       static_cast<Type>(1) / (far - near), -near / (far - near)            },
                 { 0.f,      0.f,       0.f,                                 1.f                             }
             };
-        else
+        else if constexpr (DepthRange == NDCDepthRange::NEGATIVE_ONE_TO_ONE)
             return
             {
                 { static_cast<Type>(2) / (right - left), 0.f,       0.f,    -(right + left) / (right - left)},
@@ -725,6 +729,8 @@ namespace omath
                 { 0.f,      0.f,       static_cast<Type>(2) / (far - near), -(far + near) / (far - near)    },
                 { 0.f,      0.f,       0.f,                                 1.f                             }
             };
+        else
+            std::unreachable();
     }
     template<class Type = float, MatStoreType St = MatStoreType::ROW_MAJOR,
              NDCDepthRange DepthRange = NDCDepthRange::NEGATIVE_ONE_TO_ONE>
@@ -740,7 +746,7 @@ namespace omath
                     { 0.f,      0.f,       -static_cast<Type>(1) / (far - near), -near / (far - near)            },
                     { 0.f,      0.f,       0.f,                                  1.f                             }
             };
-        else
+        else if constexpr (DepthRange == NDCDepthRange::NEGATIVE_ONE_TO_ONE)
             return
             {
                     { static_cast<Type>(2) / (right - left), 0.f,       0.f,     -(right + left) / (right - left)},
@@ -748,6 +754,8 @@ namespace omath
                     { 0.f,      0.f,       -static_cast<Type>(2) / (far - near), -(far + near) / (far - near)    },
                     { 0.f,      0.f,       0.f,                                  1.f                             }
             };
+        else
+            std::unreachable();
     }
     template<class T = float, MatStoreType St = MatStoreType::COLUMN_MAJOR>
    Mat<4, 4, T, St> mat_look_at_left_handed(const Vector3<T>& eye, const Vector3<T>& center, const Vector3<T>& up)
diff --git a/source/engines/cry_engine/formulas.cpp b/source/engines/cry_engine/formulas.cpp
index 4d5bc94e..301016b9 100644
--- a/source/engines/cry_engine/formulas.cpp
+++ b/source/engines/cry_engine/formulas.cpp
@@ -41,6 +41,9 @@ namespace omath::cry_engine
             return mat_perspective_left_handed<float, MatStoreType::ROW_MAJOR, NDCDepthRange::ZERO_TO_ONE>(
                     field_of_view, aspect_ratio, near, far);
 
-        return mat_perspective_left_handed(field_of_view, aspect_ratio, near, far);
+        if (ndc_depth_range == NDCDepthRange::NEGATIVE_ONE_TO_ONE)
+            return mat_perspective_left_handed<float, MatStoreType::ROW_MAJOR, NDCDepthRange::NEGATIVE_ONE_TO_ONE>(
+                    field_of_view, aspect_ratio, near, far);
+        std::unreachable();
     }
 } // namespace omath::unity_engine
diff --git a/source/engines/frostbite_engine/formulas.cpp b/source/engines/frostbite_engine/formulas.cpp
index 2c0d6cc4..c3193cb1 100644
--- a/source/engines/frostbite_engine/formulas.cpp
+++ b/source/engines/frostbite_engine/formulas.cpp
@@ -41,6 +41,10 @@ namespace omath::frostbite_engine
             return mat_perspective_left_handed<float, MatStoreType::ROW_MAJOR, NDCDepthRange::ZERO_TO_ONE>(
                     field_of_view, aspect_ratio, near, far);
 
-        return mat_perspective_left_handed(field_of_view, aspect_ratio, near, far);
+        if (ndc_depth_range == NDCDepthRange::NEGATIVE_ONE_TO_ONE)
+            return mat_perspective_left_handed<float, MatStoreType::ROW_MAJOR, NDCDepthRange::NEGATIVE_ONE_TO_ONE>(
+                    field_of_view, aspect_ratio, near, far);
+
+        std::unreachable();
     }
 } // namespace omath::unity_engine
diff --git a/source/engines/iw_engine/formulas.cpp b/source/engines/iw_engine/formulas.cpp
index ca59ecd6..e7ab4b88 100644
--- a/source/engines/iw_engine/formulas.cpp
+++ b/source/engines/iw_engine/formulas.cpp
@@ -50,12 +50,13 @@ namespace omath::iw_engine
                     {0, 0, far / (far - near), -(near * far) / (far - near)},
                     {0, 0, 1, 0},
             };
-
-        return {
-                {1.f / (aspect_ratio * fov_half_tan), 0, 0, 0},
-                {0, 1.f / (fov_half_tan), 0, 0},
-                {0, 0, (far + near) / (far - near), -(2.f * far * near) / (far - near)},
-                {0, 0, 1, 0},
-        };
+        if (ndc_depth_range == NDCDepthRange::NEGATIVE_ONE_TO_ONE)
+            return {
+                    {1.f / (aspect_ratio * fov_half_tan), 0, 0, 0},
+                    {0, 1.f / (fov_half_tan), 0, 0},
+                    {0, 0, (far + near) / (far - near), -(2.f * far * near) / (far - near)},
+                    {0, 0, 1, 0},
+            };
+        std::unreachable();
     };
 } // namespace omath::iw_engine
diff --git a/source/engines/opengl_engine/formulas.cpp b/source/engines/opengl_engine/formulas.cpp
index 2f936acc..93eec900 100644
--- a/source/engines/opengl_engine/formulas.cpp
+++ b/source/engines/opengl_engine/formulas.cpp
@@ -8,15 +8,15 @@ namespace omath::opengl_engine
 
     Vector3<float> forward_vector(const ViewAngles& angles) noexcept
     {
-        const auto vec
-                = rotation_matrix(angles) * mat_column_from_vector<float, MatStoreType::COLUMN_MAJOR>(k_abs_forward);
+        const auto vec =
+                rotation_matrix(angles) * mat_column_from_vector<float, MatStoreType::COLUMN_MAJOR>(k_abs_forward);
 
         return {vec.at(0, 0), vec.at(1, 0), vec.at(2, 0)};
     }
     Vector3<float> right_vector(const ViewAngles& angles) noexcept
     {
-        const auto vec
-                = rotation_matrix(angles) * mat_column_from_vector<float, MatStoreType::COLUMN_MAJOR>(k_abs_right);
+        const auto vec =
+                rotation_matrix(angles) * mat_column_from_vector<float, MatStoreType::COLUMN_MAJOR>(k_abs_right);
 
         return {vec.at(0, 0), vec.at(1, 0), vec.at(2, 0)};
     }
@@ -28,7 +28,7 @@ namespace omath::opengl_engine
     }
     Mat4X4 calc_view_matrix(const ViewAngles& angles, const Vector3<float>& cam_origin) noexcept
     {
-        return mat_look_at_right_handed(cam_origin, cam_origin+forward_vector(angles), up_vector(angles));
+        return mat_look_at_right_handed(cam_origin, cam_origin + forward_vector(angles), up_vector(angles));
     }
     Mat4X4 rotation_matrix(const ViewAngles& angles) noexcept
     {
@@ -39,21 +39,14 @@ namespace omath::opengl_engine
     Mat4X4 calc_perspective_projection_matrix(const float field_of_view, const float aspect_ratio, const float near,
                                               const float far, const NDCDepthRange ndc_depth_range) noexcept
     {
-        const float fov_half_tan = std::tan(angles::degrees_to_radians(field_of_view) / 2.f);
+        if (ndc_depth_range == NDCDepthRange::NEGATIVE_ONE_TO_ONE)
+            return mat_perspective_right_handed<float, MatStoreType::COLUMN_MAJOR, NDCDepthRange::NEGATIVE_ONE_TO_ONE>(
+                    field_of_view, aspect_ratio, near, far);
 
         if (ndc_depth_range == NDCDepthRange::ZERO_TO_ONE)
-            return {
-                    {1.f / (aspect_ratio * fov_half_tan), 0, 0, 0},
-                    {0, 1.f / (fov_half_tan), 0, 0},
-                    {0, 0, -far / (far - near), -(near * far) / (far - near)},
-                    {0, 0, -1, 0},
-            };
+            return mat_perspective_right_handed<float, MatStoreType::COLUMN_MAJOR, NDCDepthRange::ZERO_TO_ONE>(
+                        field_of_view, aspect_ratio, near, far);
 
-        return {
-                {1.f / (aspect_ratio * fov_half_tan), 0, 0, 0},
-                {0, 1.f / (fov_half_tan), 0, 0},
-                {0, 0, -(far + near) / (far - near), -(2.f * far * near) / (far - near)},
-                {0, 0, -1, 0},
-        };
+        std::unreachable();
     }
 } // namespace omath::opengl_engine
diff --git a/source/engines/source_engine/formulas.cpp b/source/engines/source_engine/formulas.cpp
index 0cf80842..85f70552 100644
--- a/source/engines/source_engine/formulas.cpp
+++ b/source/engines/source_engine/formulas.cpp
@@ -50,12 +50,13 @@ namespace omath::source_engine
                     {0, 0, far / (far - near), -(near * far) / (far - near)},
                     {0, 0, 1, 0},
             };
-
-        return {
-                {1.f / (aspect_ratio * fov_half_tan), 0, 0, 0},
-                {0, 1.f / (fov_half_tan), 0, 0},
-                {0, 0, (far + near) / (far - near), -(2.f * far * near) / (far - near)},
-                {0, 0, 1, 0},
-        };
+        if (ndc_depth_range == NDCDepthRange::NEGATIVE_ONE_TO_ONE)
+            return {
+                    {1.f / (aspect_ratio * fov_half_tan), 0, 0, 0},
+                    {0, 1.f / (fov_half_tan), 0, 0},
+                    {0, 0, (far + near) / (far - near), -(2.f * far * near) / (far - near)},
+                    {0, 0, 1, 0},
+            };
+        std::unreachable();
     }
 } // namespace omath::source_engine
diff --git a/source/engines/unity_engine/formulas.cpp b/source/engines/unity_engine/formulas.cpp
index 7e955258..51e4c4c8 100644
--- a/source/engines/unity_engine/formulas.cpp
+++ b/source/engines/unity_engine/formulas.cpp
@@ -40,7 +40,10 @@ namespace omath::unity_engine
         if (ndc_depth_range == NDCDepthRange::ZERO_TO_ONE)
             return omath::mat_perspective_right_handed<float, MatStoreType::ROW_MAJOR, NDCDepthRange::ZERO_TO_ONE>(
                     field_of_view, aspect_ratio, near, far);
-
-        return omath::mat_perspective_right_handed(field_of_view, aspect_ratio, near, far);
+        if (ndc_depth_range == NDCDepthRange::NEGATIVE_ONE_TO_ONE)
+            return omath::mat_perspective_right_handed<float, MatStoreType::ROW_MAJOR,
+                                                       NDCDepthRange::NEGATIVE_ONE_TO_ONE>(field_of_view, aspect_ratio,
+                                                                                           near, far);
+        std::unreachable();
     }
 } // namespace omath::unity_engine