Have you tried increasing the HSphere subdivs?
If that doesn't help I would render the ground as a separate pass with a saved solution and comp in the ball and the character rendered with single frame. By setting the correct matte properties on the ground you should get correct shadows and GI.
This would probably render faster anyway.
If that doesn't help I would render the ground as a separate pass with a saved solution and comp in the ball and the character rendered with single frame. By setting the correct matte properties on the ground you should get correct shadows and GI.
This would probably render faster anyway.
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