We're using Noesis 3.2.3 in our quite big Unity project and had exceptions with non invertible matrices.

We needed to change those lines

public bool HasInverse {
get { return Math.Abs(Determinant) >= 0.0001f; }
}

public void Invert() {
float determinant = Determinant;
if (Math.Abs(determinant) < 0.0001f) {
throw new InvalidOperationException("Matrix is not Invertible");
}

to

public bool HasInverse {
get { return Math.Abs(Determinant) >= float.Epsilon; }
}

public void Invert() {
float determinant = Determinant;
if (Math.Abs(determinant) < float.Epsilon) {
throw new InvalidOperationException("Matrix is not Invertible");
}

Our map needs to invert some close to singular matrices... We're doing matrix transforms from long/lat (world positions) in meters to screen space, which obviously have very large numbers. Works fine, could be change of course.

Do you think that is a change which could make it into the official next version?