Intensified realism is the perception of ones environment as being more realistic or perceptionally raw than what is typically experienced. This might be described as experiencing things as "more real than real" or feeling like a cartoon character who has suddenly been dropped into a live-action world. This effect can impact any of the senses, including tactile, visual, auditory, olfactory, gustatory, thermoceptive, and pain, and it will often affect multiple senses simultaneously.
Intensified realism is associated with moderare doses of psychadelics such as LSD and dissociatives such as DXM. Individuals may also experience intensified realism in states of sleep deprivation.
I'm not sure how this is different from acuity enhancement in that
The CSTC model of the brain posits that the thalamus plays a key role in controlling or gating external sensory information to the conscious faculties and is thereby fundamentally involved in the regulation of a person's awareness and attention. The interruption of psychedelics to these neural pathways that inhibit the sensory gating systems may, therefore, result in an enhanced availability of sensory information which is usually filtered out by these systems. This process is likely also involved in the various visual, tactile, and auditory enhancements which commonly occur when under the influence of a psychedelic experience.