In surround instances, Sculpture Extended Parameters display the Surround Range and Surround Diversity parameters:
Surround parameters
Surround Range slider: Drag to set the range of the surround angle—the breadth of the surround field. Imagine an LFO routed to pickup pan position with an amount of 1.0. Setting the LFO waveform to sawtooth and the Surround Range to 360 results in circular movement—around the entire surround circle—of the voice output. The Surround Range parameter also influences the Key and Pickup spread parameters in the same way.
Surround Diversity slider: Drag to determine how the output signal is spread across your surround speakers. If you choose a value of 0, only the speakers closest to the original signal position carry the signal. A diversity of 1 means that all speakers carry an identical amount of the signal.