An object alteration is the experience of perceiving objects, and scenes to be progressively warping, moving, stretching, animating, and shifting in their 3-dimensional form in a manner which can vary from subtle to extreme.     When the person double takes the object returns to its original shape until it is looked at directly once again, whereafter it begins distorting again in a similar or different manner. The manner in which the alterations occur is not uniform and cannot be reliably predicted. The intensity of the effect is often linked to the intensity and progression of the mental state that precludes this effect. For example, when staring at an object such as a chair its 3-dimensional shape may begin to drastically elongate or tilt into an exaggerated form which retains its original colours and textures. Another common manifestation of this effect is the perception of textures progressively extending and stretching outward from the surfaces which they reside upon in the form of a detailed 3-dimensional structure  somewhat similar to complex, opaque, and solidified smoke. These structures usually maintain a size which is consistent with the width of the texture it is extending from. They can also range from anywhere between several inches to several meters in length. For example, if one is staring at a painting on the wall it may extend in one direction on a 2-dimensional plane until the observer looks away.    This is likely an indirect result of external hallucinations being applied to objects within the user's environment occurring in a manner which does not introduce new data, but simply alters the perception of a 3-dimensional structure's content. Object alterations are often accompanied by other coinciding effects such as delirium and psychosis.  They are most commonly induced under the influence of heavy dosages of deliriant compounds, such as DPH and datura. However, they can also occur under the influence of stimulant psychosis and sleep deprivation.
- Kleinman, J. E., Gillin, J. C., & Wyatt, R. J. (1977). A comparison of the phenomenology of hallucinogens and schizophrenia from some autobiographical accounts. Schizophrenia Bulletin, 3(4), 567. | https://dx.doi.org/10.1093/schbul/3.4.560
- Obreshkova, D., Kandilarov, I., Angelova, V. T., Iliev, Y., Atanasov, P., & Fotev, P. S. (2017). Pharmaco-toxicological aspects and analysis of phenylalkylamine and indolylalkylamine hallucinogens. Pharmacia, 64(1), 32-47. (2) | http://bsphs.org/wp-content/uploads/2017/04/Angelova.pdf
- Gallimore, A. R. (2015). Restructuring consciousness–the psychedelic state in light of integrated information theory. Frontiers in human neuroscience, 9, 346. | https://dx.doi.org/10.3389%2Ffnhum.2015.00346
- Espiard, M. L., Lecardeur, L., Abadie, P., Halbecq, I., & Dollfus, S. (2005). Hallucinogen persisting perception disorder after psilocybin consumption: a case study. European Psychiatry, 20(5), 458-460. | https://doi.org/10.1016/j.eurpsy.2005.04.008