Per-non-displayed continuous dim tolerance (typical: scene maxRadius).
Initial filler for the tolerance array before the per-dim rules below
are applied. Every entry is overwritten — a dim with no metadata falls
through to maxRadius, not to this value — so it does not currently
reach the returned ViewState.
Options controlling how simpleDimsToViewState fills the per-dimension tolerance array when converting a
SimpleDimssnapshot into aViewState.