Answer: “Thereafter there was something strange in his voice.”
Step-by-step explanation:
All the other options are descriptions of the appearance of something such as waves or sleeves and so can be conveyed vividly in a painting. What is hard to convey in a painting however, is sound, for the simple reason that paintings cannot speak and any voice heard would be the individual interpretation of the person gazing upon it.
This is why a strangeness in the voice of the character in question would be the most difficult to depict in a painting about the scene in question.