Transformations
External hallucinations within psychedelics can be described as visual transformations of specific parts of environment into other concepts. They are progressive in nature, which means they form by arising from patterns or objects and then, over a period of seconds, by drifting, smoothing or locking into an entirely new appearance of still or animated objects, people, animals, concepts, places or anything you could possibly imagine. This is greatly enhanced and fuelled by the separate visual effect of enhanced pattern recognition, causing vague stimuli (which already looks vaguely like abstract concepts due to our inbuilt sense of pareidolia) to transform into extremely detailed versions of what they were already perceived as.
The process of smoothing or locking, which transformations seem to be generated through, requires some minimal amount of focus and concentration to sustain. Losing concentration for an instant can cause the image to fade away or shift into another image.
Holding the eyes still will increase the intensity of the progressive transformation.