Clamping reflection power

Here are images using the same code as before, but with the reflection power clamped to 1.0:

Index of refraction 1.0 to 1.0:

Index of refraction 1.0 to 1.33:

Index of refraction transition from 1.33 to 1.00


What's up with that light blue square? Is that a crappily rendered specular highlight?

Ok, back to reflections. These images look much better to me, but I'm not sure if they are correct. I expect a large reflection in the 1.33 image as it is sitting over an infinite plane.