motion track, glass sphere

can’t see through sphere to road, any ideas? thanks https://www.youtube.com/watch?v=Mtz-POLpQqA

What does your node setup look like?

Also, the lighting in the video is coming from the right, but the sphere is lit from the left.

Steve S

the floor plane is too close to the curb, so I put the light on the left , the light that the sphere is reflecting is coming from the ground plane. Should I use an alpha over?