I developed HPPD within 6 months of regular (1-2 times a week) cannabis use about 16 years ago, and it persists to this day. This was before I had used LSD or any other potent psychedelic. My main symptom consists of a green static in the absence of sunlight that covers my entire field of vision. It interferes with night vision in general, making things like star gazing difficult. I also attribute cannabis to a heightened awareness of floaters, but this is largely speculation on my part as there could be a variety of factors involved. The static on the other hand I'm certain was caused by cannabis.
About 2 years ago I reduced my pot use to more than once a month, and within the last year have only smoked a few times, but the night static is just as prevalent as ever.
Other psychedelics have caused symptoms, but these dissipated over time. Symptoms included a halo affect in my periphery vision after my first weekend of 2C-I use (more like a binge); and trails left behind in dim lighting from illuminated objects such as a the screen and keys of a cell phone. The trails, which I believe were triggered by 2C-I, curiously persisted until I drastically reduced my cannabis use. It's been about a year since I've noticed them.