diff --git a/Cargo.toml b/Cargo.toml
index f879ae1f..012b9c80 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -38,11 +38,8 @@ macros = [ "nalgebra-macros" ]
 convert-mint = [ "mint" ]
 convert-bytemuck = [ "bytemuck" ]
 convert-glam013 = [ "glam013" ]
-convert-glam013-unchecked = [ "convert-glam013" ] # Enable edgy conversions like Mat4 -> Isometry3
 convert-glam014 = [ "glam014" ]
-convert-glam014-unchecked = [ "convert-glam014" ] # Enable edgy conversions like Mat4 -> Isometry3
 convert-glam015 = [ "glam015" ]
-convert-glam015-unchecked = [ "convert-glam015" ] # Enable edgy conversions like Mat4 -> Isometry3
 
 # Serialization
 ## To use serde in a #[no-std] environment, enable the
diff --git a/src/third_party/glam/common/glam_isometry.rs b/src/third_party/glam/common/glam_isometry.rs
index 3d2cbaba..6bd970d2 100644
--- a/src/third_party/glam/common/glam_isometry.rs
+++ b/src/third_party/glam/common/glam_isometry.rs
@@ -1,5 +1,6 @@
-use super::glam::{DMat3, DMat4, DQuat, DVec3, Mat3, Mat4, Quat, Vec3};
-use crate::{Isometry2, Isometry3};
+use super::glam::{DMat3, DMat4, DQuat, DVec2, DVec3, Mat3, Mat4, Quat, Vec2, Vec3};
+use crate::{Isometry2, Isometry3, Matrix3, Matrix4};
+use std::convert::TryFrom;
 
 impl From<Isometry2<f32>> for Mat3 {
     fn from(iso: Isometry2<f32>) -> Mat3 {
@@ -38,7 +39,7 @@ impl From<Isometry3<f64>> for (DVec3, DQuat) {
 impl From<Isometry2<f32>> for (Vec3, Quat) {
     fn from(iso: Isometry2<f32>) -> (Vec3, Quat) {
         let tra = Vec3::new(iso.translation.x, iso.translation.y, 0.0);
-        let rot = Quat::from_axis_angle(Vec3::new(0.0, 0.0, 1.0), iso.rotation.angle());
+        let rot = Quat::from_axis_angle(Vec3::Z, iso.rotation.angle());
         (tra, rot)
     }
 }
@@ -46,145 +47,147 @@ impl From<Isometry2<f32>> for (Vec3, Quat) {
 impl From<Isometry2<f64>> for (DVec3, DQuat) {
     fn from(iso: Isometry2<f64>) -> (DVec3, DQuat) {
         let tra = DVec3::new(iso.translation.x, iso.translation.y, 0.0);
-        let rot = DQuat::from_axis_angle(DVec3::new(0.0, 0.0, 1.0), iso.rotation.angle());
+        let rot = DQuat::from_axis_angle(DVec3::Z, iso.rotation.angle());
         (tra, rot)
     }
 }
 
-#[cfg(feature = "convert-glam-unchecked")]
-mod unchecked {
-    use super::super::glam::{DMat3, DMat4, DQuat, DVec2, DVec3, Mat3, Mat4, Quat, Vec2, Vec3};
-    use crate::{Isometry2, Isometry3, Matrix3, Matrix4};
-
-    impl From<(Vec3, Quat)> for Isometry3<f32> {
-        fn from((tra, rot): (Vec3, Quat)) -> Self {
-            Isometry3::from_parts(tra.into(), rot.into())
-        }
-    }
-
-    impl From<(DVec3, DQuat)> for Isometry3<f64> {
-        fn from((tra, rot): (DVec3, DQuat)) -> Self {
-            Isometry3::from_parts(tra.into(), rot.into())
-        }
-    }
-
-    impl From<(Vec3, Quat)> for Isometry2<f32> {
-        fn from((tra, rot): (Vec3, Quat)) -> Self {
-            Isometry2::new([tra.x, tra.y].into(), rot.to_axis_angle().1)
-        }
-    }
-
-    impl From<(DVec3, DQuat)> for Isometry2<f64> {
-        fn from((tra, rot): (DVec3, DQuat)) -> Self {
-            Isometry2::new([tra.x, tra.y].into(), rot.to_axis_angle().1)
-        }
-    }
-
-    impl From<(Vec2, Quat)> for Isometry2<f32> {
-        fn from((tra, rot): (Vec2, Quat)) -> Self {
-            Isometry2::new([tra.x, tra.y].into(), rot.to_axis_angle().1)
-        }
-    }
-
-    impl From<(DVec2, DQuat)> for Isometry2<f64> {
-        fn from((tra, rot): (DVec2, DQuat)) -> Self {
-            Isometry2::new([tra.x, tra.y].into(), rot.to_axis_angle().1)
-        }
-    }
-
-    impl From<(Vec2, f32)> for Isometry2<f32> {
-        fn from((tra, rot): (Vec2, f32)) -> Self {
-            Isometry2::new([tra.x, tra.y].into(), rot)
-        }
-    }
-
-    impl From<(DVec2, f64)> for Isometry2<f64> {
-        fn from((tra, rot): (DVec2, f64)) -> Self {
-            Isometry2::new([tra.x, tra.y].into(), rot)
-        }
-    }
-
-    impl From<Quat> for Isometry3<f32> {
-        fn from(rot: Quat) -> Self {
-            Isometry3::from_parts(crate::one(), rot.into())
-        }
-    }
-
-    impl From<DQuat> for Isometry3<f64> {
-        fn from(rot: DQuat) -> Self {
-            Isometry3::from_parts(crate::one(), rot.into())
-        }
-    }
-
-    impl From<Quat> for Isometry2<f32> {
-        fn from(rot: Quat) -> Self {
-            Isometry2::new(crate::zero(), rot.to_axis_angle().1)
-        }
-    }
-
-    impl From<DQuat> for Isometry2<f64> {
-        fn from(rot: DQuat) -> Self {
-            Isometry2::new(crate::zero(), rot.to_axis_angle().1)
-        }
-    }
-
-    impl From<Vec3> for Isometry3<f32> {
-        fn from(tra: Vec3) -> Self {
-            Isometry3::from_parts(tra.into(), crate::one())
-        }
-    }
-
-    impl From<DVec3> for Isometry3<f64> {
-        fn from(tra: DVec3) -> Self {
-            Isometry3::from_parts(tra.into(), crate::one())
-        }
-    }
-
-    impl From<Vec2> for Isometry2<f32> {
-        fn from(tra: Vec2) -> Self {
-            Isometry2::new(tra.into(), crate::one())
-        }
-    }
-
-    impl From<DVec2> for Isometry2<f64> {
-        fn from(tra: DVec2) -> Self {
-            Isometry2::new(tra.into(), crate::one())
-        }
-    }
-
-    impl From<Vec3> for Isometry2<f32> {
-        fn from(tra: Vec3) -> Self {
-            Isometry2::new([tra.x, tra.y].into(), crate::one())
-        }
-    }
-
-    impl From<DVec3> for Isometry2<f64> {
-        fn from(tra: DVec3) -> Self {
-            Isometry2::new([tra.x, tra.y].into(), crate::one())
-        }
-    }
-
-    impl From<Mat3> for Isometry2<f32> {
-        fn from(mat3: Mat3) -> Isometry2<f32> {
-            crate::convert_unchecked(Matrix3::from(mat3))
-        }
-    }
-
-    impl From<Mat4> for Isometry3<f32> {
-        fn from(mat4: Mat4) -> Isometry3<f32> {
-            crate::convert_unchecked(Matrix4::from(mat4))
-        }
-    }
-
-    impl From<DMat3> for Isometry2<f64> {
-        fn from(mat3: DMat3) -> Isometry2<f64> {
-            crate::convert_unchecked(Matrix3::from(mat3))
-        }
-    }
-
-    impl From<DMat4> for Isometry3<f64> {
-        fn from(mat4: DMat4) -> Isometry3<f64> {
-            crate::convert_unchecked(Matrix4::from(mat4))
-        }
+impl From<(Vec3, Quat)> for Isometry3<f32> {
+    fn from((tra, rot): (Vec3, Quat)) -> Self {
+        Isometry3::from_parts(tra.into(), rot.into())
+    }
+}
+
+impl From<(DVec3, DQuat)> for Isometry3<f64> {
+    fn from((tra, rot): (DVec3, DQuat)) -> Self {
+        Isometry3::from_parts(tra.into(), rot.into())
+    }
+}
+
+impl From<(Vec3, Quat)> for Isometry2<f32> {
+    fn from((tra, rot): (Vec3, Quat)) -> Self {
+        Isometry2::new([tra.x, tra.y].into(), rot.to_axis_angle().1)
+    }
+}
+
+impl From<(DVec3, DQuat)> for Isometry2<f64> {
+    fn from((tra, rot): (DVec3, DQuat)) -> Self {
+        Isometry2::new([tra.x, tra.y].into(), rot.to_axis_angle().1)
+    }
+}
+
+impl From<(Vec2, Quat)> for Isometry2<f32> {
+    fn from((tra, rot): (Vec2, Quat)) -> Self {
+        Isometry2::new(tra.into(), rot.to_axis_angle().1)
+    }
+}
+
+impl From<(DVec2, DQuat)> for Isometry2<f64> {
+    fn from((tra, rot): (DVec2, DQuat)) -> Self {
+        Isometry2::new(tra.into(), rot.to_axis_angle().1)
+    }
+}
+
+impl From<(Vec2, f32)> for Isometry2<f32> {
+    fn from((tra, rot): (Vec2, f32)) -> Self {
+        Isometry2::new(tra.into(), rot)
+    }
+}
+
+impl From<(DVec2, f64)> for Isometry2<f64> {
+    fn from((tra, rot): (DVec2, f64)) -> Self {
+        Isometry2::new(tra.into(), rot)
+    }
+}
+
+impl From<Quat> for Isometry3<f32> {
+    fn from(rot: Quat) -> Self {
+        Isometry3::from_parts(crate::one(), rot.into())
+    }
+}
+
+impl From<DQuat> for Isometry3<f64> {
+    fn from(rot: DQuat) -> Self {
+        Isometry3::from_parts(crate::one(), rot.into())
+    }
+}
+
+impl From<Quat> for Isometry2<f32> {
+    fn from(rot: Quat) -> Self {
+        Isometry2::new(crate::zero(), rot.to_axis_angle().1)
+    }
+}
+
+impl From<DQuat> for Isometry2<f64> {
+    fn from(rot: DQuat) -> Self {
+        Isometry2::new(crate::zero(), rot.to_axis_angle().1)
+    }
+}
+
+impl From<Vec3> for Isometry3<f32> {
+    fn from(tra: Vec3) -> Self {
+        Isometry3::from_parts(tra.into(), crate::one())
+    }
+}
+
+impl From<DVec3> for Isometry3<f64> {
+    fn from(tra: DVec3) -> Self {
+        Isometry3::from_parts(tra.into(), crate::one())
+    }
+}
+
+impl From<Vec2> for Isometry2<f32> {
+    fn from(tra: Vec2) -> Self {
+        Isometry2::new(tra.into(), crate::one())
+    }
+}
+
+impl From<DVec2> for Isometry2<f64> {
+    fn from(tra: DVec2) -> Self {
+        Isometry2::new(tra.into(), crate::one())
+    }
+}
+
+impl From<Vec3> for Isometry2<f32> {
+    fn from(tra: Vec3) -> Self {
+        Isometry2::new([tra.x, tra.y].into(), crate::one())
+    }
+}
+
+impl From<DVec3> for Isometry2<f64> {
+    fn from(tra: DVec3) -> Self {
+        Isometry2::new([tra.x, tra.y].into(), crate::one())
+    }
+}
+
+impl TryFrom<Mat3> for Isometry2<f32> {
+    type Error = ();
+
+    fn try_from(mat3: Mat3) -> Result<Isometry2<f32>, Self::Error> {
+        crate::try_convert(Matrix3::from(mat3)).ok_or(())
+    }
+}
+
+impl TryFrom<Mat4> for Isometry3<f32> {
+    type Error = ();
+
+    fn try_from(mat4: Mat4) -> Result<Isometry3<f32>, Self::Error> {
+        crate::try_convert(Matrix4::from(mat4)).ok_or(())
+    }
+}
+
+impl TryFrom<DMat3> for Isometry2<f64> {
+    type Error = ();
+
+    fn try_from(mat3: DMat3) -> Result<Isometry2<f64>, Self::Error> {
+        crate::try_convert(Matrix3::from(mat3)).ok_or(())
+    }
+}
+
+impl TryFrom<DMat4> for Isometry3<f64> {
+    type Error = ();
+
+    fn try_from(mat4: DMat4) -> Result<Isometry3<f64>, Self::Error> {
+        crate::try_convert(Matrix4::from(mat4)).ok_or(())
     }
 }
diff --git a/src/third_party/glam/common/glam_quaternion.rs b/src/third_party/glam/common/glam_quaternion.rs
index a622bab7..e0432ead 100644
--- a/src/third_party/glam/common/glam_quaternion.rs
+++ b/src/third_party/glam/common/glam_quaternion.rs
@@ -43,22 +43,16 @@ impl From<UnitQuaternion<f64>> for DQuat {
     }
 }
 
-#[cfg(feature = "convert-glam-unchecked")]
-mod unchecked {
-    use super::super::glam::{DQuat, Quat};
-    use crate::{Quaternion, UnitQuaternion};
-
-    impl From<Quat> for UnitQuaternion<f32> {
-        #[inline]
-        fn from(e: Quat) -> UnitQuaternion<f32> {
-            UnitQuaternion::new_unchecked(Quaternion::from(e))
-        }
-    }
-
-    impl From<DQuat> for UnitQuaternion<f64> {
-        #[inline]
-        fn from(e: DQuat) -> UnitQuaternion<f64> {
-            UnitQuaternion::new_unchecked(Quaternion::from(e))
-        }
+impl From<Quat> for UnitQuaternion<f32> {
+    #[inline]
+    fn from(e: Quat) -> UnitQuaternion<f32> {
+        UnitQuaternion::new_normalize(Quaternion::from(e))
+    }
+}
+
+impl From<DQuat> for UnitQuaternion<f64> {
+    #[inline]
+    fn from(e: DQuat) -> UnitQuaternion<f64> {
+        UnitQuaternion::new_normalize(Quaternion::from(e))
     }
 }
diff --git a/src/third_party/glam/common/glam_rotation.rs b/src/third_party/glam/common/glam_rotation.rs
index 6ae8d809..1e1fe8e1 100644
--- a/src/third_party/glam/common/glam_rotation.rs
+++ b/src/third_party/glam/common/glam_rotation.rs
@@ -1,5 +1,5 @@
 use super::glam::{DMat2, DQuat, Mat2, Quat};
-use crate::{Rotation2, Rotation3, UnitQuaternion};
+use crate::{Rotation2, Rotation3, UnitComplex, UnitQuaternion};
 
 impl From<Rotation2<f32>> for Mat2 {
     #[inline]
@@ -29,36 +29,30 @@ impl From<Rotation3<f64>> for DQuat {
     }
 }
 
-#[cfg(feature = "convert-glam-unchecked")]
-mod unchecked {
-    use super::super::glam::{DMat2, DQuat, Mat2, Quat};
-    use crate::{Rotation2, Rotation3, UnitQuaternion};
-
-    impl From<Mat2> for Rotation2<f32> {
-        #[inline]
-        fn from(e: Mat2) -> Rotation2<f32> {
-            Rotation2::from_matrix_unchecked(e.into())
-        }
-    }
-
-    impl From<DMat2> for Rotation2<f64> {
-        #[inline]
-        fn from(e: DMat2) -> Rotation2<f64> {
-            Rotation2::from_matrix_unchecked(e.into())
-        }
-    }
-
-    impl From<Quat> for Rotation3<f32> {
-        #[inline]
-        fn from(e: Quat) -> Rotation3<f32> {
-            Rotation3::from(UnitQuaternion::from(e))
-        }
-    }
-
-    impl From<DQuat> for Rotation3<f64> {
-        #[inline]
-        fn from(e: DQuat) -> Rotation3<f64> {
-            Rotation3::from(UnitQuaternion::from(e))
-        }
+impl From<Mat2> for Rotation2<f32> {
+    #[inline]
+    fn from(e: Mat2) -> Rotation2<f32> {
+        UnitComplex::from(e).to_rotation_matrix()
+    }
+}
+
+impl From<DMat2> for Rotation2<f64> {
+    #[inline]
+    fn from(e: DMat2) -> Rotation2<f64> {
+        UnitComplex::from(e).to_rotation_matrix()
+    }
+}
+
+impl From<Quat> for Rotation3<f32> {
+    #[inline]
+    fn from(e: Quat) -> Rotation3<f32> {
+        Rotation3::from(UnitQuaternion::from(e))
+    }
+}
+
+impl From<DQuat> for Rotation3<f64> {
+    #[inline]
+    fn from(e: DQuat) -> Rotation3<f64> {
+        Rotation3::from(UnitQuaternion::from(e))
     }
 }
diff --git a/src/third_party/glam/common/glam_similarity.rs b/src/third_party/glam/common/glam_similarity.rs
index 12295502..f6679f08 100644
--- a/src/third_party/glam/common/glam_similarity.rs
+++ b/src/third_party/glam/common/glam_similarity.rs
@@ -1,5 +1,6 @@
 use super::glam::{DMat3, DMat4, Mat3, Mat4};
-use crate::{Similarity2, Similarity3};
+use crate::{Matrix3, Matrix4, Similarity2, Similarity3};
+use std::convert::TryFrom;
 
 impl From<Similarity2<f32>> for Mat3 {
     fn from(iso: Similarity2<f32>) -> Mat3 {
@@ -23,32 +24,30 @@ impl From<Similarity3<f64>> for DMat4 {
     }
 }
 
-#[cfg(feature = "convert-glam-unchecked")]
-mod unchecked {
-    use super::super::glam::{DMat3, DMat4, Mat3, Mat4};
-    use crate::{Matrix3, Matrix4, Similarity2, Similarity3};
-
-    impl From<Mat3> for Similarity2<f32> {
-        fn from(mat3: Mat3) -> Similarity2<f32> {
-            crate::convert_unchecked(Matrix3::from(mat3))
-        }
-    }
-
-    impl From<Mat4> for Similarity3<f32> {
-        fn from(mat4: Mat4) -> Similarity3<f32> {
-            crate::convert_unchecked(Matrix4::from(mat4))
-        }
-    }
-
-    impl From<DMat3> for Similarity2<f64> {
-        fn from(mat3: DMat3) -> Similarity2<f64> {
-            crate::convert_unchecked(Matrix3::from(mat3))
-        }
-    }
-
-    impl From<DMat4> for Similarity3<f64> {
-        fn from(mat4: DMat4) -> Similarity3<f64> {
-            crate::convert_unchecked(Matrix4::from(mat4))
-        }
+impl TryFrom<Mat3> for Similarity2<f32> {
+    type Error = ();
+    fn try_from(mat3: Mat3) -> Result<Similarity2<f32>, ()> {
+        crate::try_convert(Matrix3::from(mat3)).ok_or(())
+    }
+}
+
+impl TryFrom<Mat4> for Similarity3<f32> {
+    type Error = ();
+    fn try_from(mat4: Mat4) -> Result<Similarity3<f32>, ()> {
+        crate::try_convert(Matrix4::from(mat4)).ok_or(())
+    }
+}
+
+impl TryFrom<DMat3> for Similarity2<f64> {
+    type Error = ();
+    fn try_from(mat3: DMat3) -> Result<Similarity2<f64>, ()> {
+        crate::try_convert(Matrix3::from(mat3)).ok_or(())
+    }
+}
+
+impl TryFrom<DMat4> for Similarity3<f64> {
+    type Error = ();
+    fn try_from(mat4: DMat4) -> Result<Similarity3<f64>, ()> {
+        crate::try_convert(Matrix4::from(mat4)).ok_or(())
     }
 }
diff --git a/src/third_party/glam/common/glam_unit_complex.rs b/src/third_party/glam/common/glam_unit_complex.rs
index ac5e405c..67b6a040 100644
--- a/src/third_party/glam/common/glam_unit_complex.rs
+++ b/src/third_party/glam/common/glam_unit_complex.rs
@@ -1,5 +1,5 @@
 use super::glam::{DMat2, Mat2};
-use crate::UnitComplex;
+use crate::{Complex, Rotation2, UnitComplex};
 
 impl From<UnitComplex<f32>> for Mat2 {
     #[inline]
@@ -15,22 +15,16 @@ impl From<UnitComplex<f64>> for DMat2 {
     }
 }
 
-#[cfg(feature = "convert-glam-unchecked")]
-mod unchecked {
-    use super::super::glam::{DMat2, Mat2};
-    use crate::{Rotation2, UnitComplex};
-
-    impl From<Mat2> for UnitComplex<f32> {
-        #[inline]
-        fn from(e: Mat2) -> UnitComplex<f32> {
-            Rotation2::from_matrix_unchecked(e.into()).into()
-        }
-    }
-
-    impl From<DMat2> for UnitComplex<f64> {
-        #[inline]
-        fn from(e: DMat2) -> UnitComplex<f64> {
-            Rotation2::from_matrix_unchecked(e.into()).into()
-        }
+impl From<Mat2> for UnitComplex<f32> {
+    #[inline]
+    fn from(e: Mat2) -> UnitComplex<f32> {
+        UnitComplex::new_normalize(Complex::new(e.x_axis.x, e.x_axis.y))
+    }
+}
+
+impl From<DMat2> for UnitComplex<f64> {
+    #[inline]
+    fn from(e: DMat2) -> UnitComplex<f64> {
+        UnitComplex::new_normalize(Complex::new(e.x_axis.x, e.x_axis.y))
     }
 }