When having stuff to do in downtown, I usually choose routes which are rich green with large old trees and/or houses whith really nice front lawns bursting with colors by the planted flowers and bushes. Even if it is a slight detour, and thus taking longer to get where I need to be. Though I prefer to be absolutely sober then.
OTOH, walking, or bicyling out of town into the surrounding country, having only the slightest 'buzz' from some weak weed/grass intensifies my perception of the colors, smells, sounds, air currents and temperatures. I'd guess 'microdosing' would be similar?
Oh, and don't forget polarized sunglasses with blue/green tint. That is upping the visuals a notch. Even without direct sunhine, when it's overcast.
Example: the leaves of trees, from afar, or high up in the crown. With bare eyes I see them, but diffuse. With polarized sunglasses I can see every single one of them, their movement in the wind, and even their structure. Similar boost for seeing waves on the river.