lightmesh, disabling primary visibility prevents refraction

[jbuttell]

Perhaps there's a good reason for this, but I've noticed that when disabling primary visibility on a lightmesh, it won't refract through a surface. Is this by design, or is this a bug?

[Zdravko]

Since the geometry is converted to a light mesh, V-Ray treats the object as a light.
Please note that lights visibility can not be disabled for reflection or refraction separately by default.