Ah sorry, glancing angle basically means a ray that is approaching 90 degrees to the normal of the surface. But I think you’ve understood what I meant.
What would be really useful with this shader, is to be able to specify the reflection strength at 0° and 90° to the normal, as well as the falloff exponent for maximum control (default would be linear, I guess, but its sometimes handy in rendered CG to be able to override that falloff for a specific look)