I could quote even more posts, showing that the entire context of the discussion at that point was about silhouettes, but that seems like an excessive amount of quoting.
I did make a mistake, however, as I thought the post you were replying to was an excerpt from
@Crimson Longinus's reply to
@Hriston's white room example in which Crimson was explicitly talking about making darkness dependent on the perspective of an observer (and implicitly that mattered due to the location of the backlight). Instead Crimson's post that you were replying to was slightly before
@Hriston's example. I apologize for the error. I don't think it makes a substantive difference in how I portrayed the exchange, however, since the post you were actually replying to was making a similar statement about an area of darkness between two lit areas (i.e. a situation of backlit darkness that would lead to silhouettes for creatures and objects in that darkness).
If you read the series of posts as not pertaining to backlights and silhouettes, then clearly we have completely different understandings of the context of that part of the discussion.