Crisp visuals, wearying confusion

2. T+02:30:00 [intensity]

intensity 

+ PLUS ONE — Clearly noticeable. You can tell when it began and how it's changing, though its full character isn't apparent yet.

3. T+08:00:00 [intensity]

intensity 

± PLUS/MINUS — Threshold — something may be present, but it's right at the edge of perception. A stronger experience would confirm it; otherwise it may be nothing.

4. T+00:00:00 [note]

Enjoyable visual effects ran from roughly two to five hours in, appearing after staring at surfaces like ceilings or trees, with surroundings shifting slightly and pine needles standing out with unusual clarity and contrast. The mental component was hard to pin down and not obviously worthwhile. By eight hours the author was weary of the effect and its accompanying confusion, relieved when it faded in the early evening, and lukewarm about trying it again.