I've come to smoke the spice only outdoors after a few indoors sessions, and try to keep my eyes open as much as I can. Here my OEV's. CEV's at another time.
I have noticed that the spice "flattens" the details of the landscape and repaints it in brighter and more primary colors than the normal experience. Every tree, or animal, or structure seems to be reduced to some iconic form and a single luminous color. All surface details of distant things become "washed out" and coated with this intense, luminous primary color. This is especially impressive with distant mountains that seem to "zoom" and compress into panels of colors in various distances. Then, of course, that entire landscape is draped in the familiar mosaics that, for me, are very consistent in composition, and appear like a vastly complex and intricate "coordinate system" (much unlike our longitude and latitude system). This same "structure" appears to be floating, or lying on top of the landscape, but it also expands throughout the air and the sky, and looks to be more spherical off the ground, with intricately detailed interiors, and all connecting and interacting with each other.
This is on about 40mg.
Adding 20mg to the same sitting, the visual field seems to flatten even more, and the earlier distinct sections of landscape effectively "melt" into each other and become "smears" of undefined colors. Parts of the mosaics become very agitated and vibrate and pulsate in flashes of blues, greens, reds and yellows. Kind of like seeing stars when you bang your head, but more structured and complex and consistent with the "lattice" of the coordinate system. BTW, this is also the time when conscious thought becomes very very difficult and I can imagine passing out if there had been just a little bit more spice in the vaporizer. And I mean really, loosing consciousness. So, careful with those higher doses, I would say.