When prims overlap the region boundary into void space they are cut off: no prims render beyond the edge of the region the prim is in.
Possible solution:
Void regions adjacent to existing regions should be considered as regions. This has to account for situations such as a void surrounded on all 4 sides and 4 corners with regions that have prims overlapping into the space. Solving this is doable, but might be complex. If accomplished, it would be a one-up - as long as it doesn't violate #4's disambiguation between water-only regions and void space.
When prims overlap the region boundary into void space they are cut off: no prims render beyond the edge of the region the prim is in.
Possible solution:
Void regions adjacent to existing regions should be considered as regions. This has to account for situations such as a void surrounded on all 4 sides and 4 corners with regions that have prims overlapping into the space. Solving this is doable, but might be complex. If accomplished, it would be a one-up - as long as it doesn't violate #4's disambiguation between water-only regions and void space.