I made sure to record the new shot at the same time and with the same weather conditions so I can make my HDR match with no problem.​ The only thing is that my camera got a little more of over exposure so I had to make it match in nuke.

New over exposed shot
I made sure to record the new shot at the same time and with the same weather conditions so I can make my HDR match with no problem.​ The only thing is that my camera got a little more of over exposure so I had to make it match in nuke.
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I make sure to had all of the layers that we will be needing to recreate the rock on the plate in nuke.

For the shadow I though that it will be easier to just color correct the shot so it matches the shadows of our clean plate, and with the shadow alpha it will just grab the information needed with not that much of a problem.

"Shadow" plate created on nuke with color correction
As for the refractions that the rock creates when it is hit with light, everything was managed with the layers and in nuke.

Alpha for occlusion

Shadow with occlusion of the rock created on nuke

