Within ACL 4.8, they have a more robust ability to continue to match to the sensory cues until they are done.
Slight changes in shades of colours are not noticed, neither are fine spaces. The person can use information held in their working memory (a few seconds) until they are done. Matching to sight, sound, taste and touch is more robust.
Bold smells are noticed and may be pleasant or unpleasant to them.