Use an individual unit to reduce the items with the specified range.
That is, this will reduces items[range.start], items[range.start + range.step]
until items[range.end] (exclusive).
Use an individual plane to reduce the items with the specified range.
That is, this will reduces items[range.start], items[range.start + range.step]
until items[range.end] (exclusive).
Use an individual cube to reduce the items with the specified range.
That is, this will reduces items[range.start], items[range.start + range.step]
until items[range.end] (exclusive). Inside a cube, the reduction will use plane operations
if use_planes is set to true.