Switch by Sam Perkins - This image serves as an example of a single frame of typical level 4 psychedelic geometry.

Geometry can be described as the experience of a person's field of vision becoming partially or completely encompassed by fast-moving, colorful, and indescribably complex geometric patterns, form constants, phosphenes, shapes, fractals, and colors. These geometric forms can also become structured and organized in a manner that presents genuine information to the person experiencing them far beyond the perception of meaningless, although complex, shapes and colors. The geometric representations may feel as though they depict specific concepts and neurological processes that exist within the brain in a manner that is extremely detailed.

Geometry is rarely motionless, generally extremely fast-moving, and self-changing in regards to its shape and style. During this process, the geometry naturally drifts laterally or radially across the visual field to create overlapping webs of geometric patterns which transition through many distinct states, all of which are visible within a single perceptual frame.

This experience is often accompanied by other coinciding effects such as internal hallucinations, environmental patterning, and drifting. It is most commonly induced under the influence of moderate dosages of psychedelic compounds such as LSD, psilocybin, and mescaline. However, they can also occur to a lesser extent under the influence of cannabinoids, stimulants, and dissociatives such as cannabis, MDMA, and DXM.


This effect is capable of manifesting itself across known nine different levels of intensity, these tend to depend on the dosage, but can also fluctuate wildly in their intensity due to external triggers such as a person's set and setting. The individual levels are defined below:

  1. Visual noise - At the lowest level, which may be experienced in a completely sober state, geometry is perceived as visual noise or static, combined with stray light and dark red regions that can be seen under the eyelids.

  2. Motion and colour - At this level, which is also obtainable without hallucinogens, the effect can be described as the appearance of unstructured regions of sudden flashes and clouds of color. These are typically referred to as phosphenes and can often be experienced in a sober state by rubbing or applying pressure on or near the closed eyes.

  3. Partially defined geometry - At this level, relatively complex shapes and patterns with a vague structure begin to form. These patterns remain strictly two-dimensional. Geometry at this level is fine, small, and zoomed out in size with a dark color palette that typically limits itself to only a few different shades, such as blacks, reds, and dark purples. They are displayed in front of both the open and closed eye visual fields across a flat veil of geometry. However, they are significantly more detailed with the eyes closed or within dark environments.

  4. Fully defined geometry - At this level, the detail in which the geometry displays itself becomes profoundly complex and fully structured, but still remains strictly two-dimensional. At this point, the geometry becomes larger in size and extremely intricate in detail with a color palette that is nearly limitless in its possibilities. They are displayed on both the open and closed eye visual field across a flat veil of geometry that floats directly before a person's eyes, remaining significantly more detailed with the eyes closed or in dark environments.

  5. 3-Dimensional geometry - At this level, the geometry has become fully three-dimensional in its shape and position across the visual field. This adds a new layer of visual complexity and leaves the geometry sprawled out across the surfaces and objects of a person's environment instead of merely displaying themselves across a basic and flat veil in front of one's visual field.

  6. Partially overriding visual perception - At this level, the geometry has become so intense, vivid, and bright that it has begun to block out and replace the external world. The visual perception of a person's environment begins to be replaced by geometry, with objects and scenery either transforming into complex geometric structures or simply being blocked out and covered by them. This occurs in a manner that drastically impairs the use of a person's normal vision. From this level of geometry onwards it is even possible to view geometry which is perceived to be four-dimensional or created from new, ineffable, non-euclidean, or nonsensical geometrical principles, although this is more common at higher levels.

  7. Fully overriding visual perception - At this level, the geometry continues to become more intense, vivid, and bright as it begins to completely block out or replace the external world and a person's sense of normal sight become completely impaired. This creates the perception that one is no longer within the external environment, but has "broken through" into another reality of extremely complex and otherworldly geometric forms.

  8. Level 8A and 8B - At the highest level, depending on subtle environmental factors, a person's state of mind, and the substance consumed geometry is capable of forking off into two separate versions of equal intensity known as level 8A and 8B.

    Once visual geometry reaches level 8A or 8B it begins to become structured and organised in a way that presents genuine information to the person experiencing it far beyond the preceding seven levels of relatively meaningless, although complex, shapes and colours. This happens through the perception of innately understood geometric representations that feel as if they depict specific concepts and neurological processes that exist within the brain. Although this is also possible to a much lesser extent at lower levels, it does not occur as consistently or intensely as it does at level 8A and 8B. At this point, concepts can be seen as not just embedded within a person's closed or open eye visual field, but can also be simultaneously felt through indescribably complex physical and cognitive sensations.

It is worth noting that there are particular attributes of psychedelic substances which tend to result in a higher likelihood of level 8A over 8B and vice versa. Psychedelics which are stimulating in physical effects and contain low amounts of hallucinatory content typically result in level 8A. For example, hallucinogens which tend towards causing level 8A include LSD, 2C-B, and 4-HO-MET. In contrast, psychedelics which lead to level 8B are typically sedating in physical effects and contain high amounts of hallucinatory content. For example, hallucinogens which tend towards causing level 8B include psilocybin, LSA, DMT, 2C-C.

8A - Perceived exposure to semantic concept network

Main article: 8A Geometry - Perceived exposure to semantic concept network

A level 8A experience can be described as the feeling of being exposed to a seemingly infinite mass of geometry comprised entirely of innately comprehensible representations which are perceived to simultaneously convey every internally stored concept, memory, and neurological structure stored within the subconscious mind simultaneously. This experience is not just perceived through visual geometric data but is also physically felt in an incomprehensible level of detail that manifests at every point across itself as complex cognitive and tactile sensations. These sensations convey an equal amount of innately understandable information as that which is also experienced through one's sense of vision.

At the lower side of level 8A, this effect is something that fluctuates wildly and is neither constant nor consistent in its intensity. Instead, it is momentarily triggered by the experience of a concept. For example, if somebody were to say the word “Internet” to a person who is currently undergoing this state, they would see the mind's concept of the "Internet" immediately manifested in a geometric form amidst the very center of their visual field. This form will then quickly branch out from itself in a manner which is similar to an ineffable spider diagram. This further expands to envelop the concepts which one associates with the original concept before branching out again to include the concepts one associates with those before repeating this process of branching out further ad infinitum. Within roughly 2 - 3 seconds, this exponentially expands within a sudden perceptual flash to include every single internally stored concept within the subconscious memory banks of one's mind simultaneously.

Once this occurs, the sensory overload can temporarily disconnect one from their external environment and result in simultaneous long-term memory suppression or "ego death" before re-stacking the person back into reality until something triggers the process again (usually immediately). The effect typically snaps one in and out of reality repeatedly as the process is triggered continuously by external stimuli.

It's worth noting, however, that at this level it can, to a certain extent, be disabled through continuous physical movement. This is because movement seemingly stops the process from branching out into everything by not giving the effect the time it needs to lock onto a concept.

As the dose of the psychoactive substance is increased, the process becomes easier to trigger whilst extending in its length and duration. This eventually results in a stable state of complete disconnection from the external environment alongside of sustained "ego death" and a lasting sense of subjectively experiencing all of existence, everything there is, and the entire universe, in a single instant.

8B - Perceived exposure to inner mechanics of consciousness

Main article: 8B - Perceived exposure to inner mechanics of consciousness

Level 8B can be described as the perception of being exposed to innately understandable geometric representations of the organisation, structure, framework, and programming behind the mind, which feel as though they convey the inner mechanics that compose all conscious and subconscious neurological processes. Those who undergo this effect may feel as if they are perceiving the inner workings of the universe, consciousness, or reality, and it is typically experienced through visual geometric data, as well as physically felt in a high level of detail throughout every point of the body as complex tactile sensations.

At the lower end of level 8B geometry, the experience manifests itself as being able to perceive the supposed organization and structure behind one's current conscious thought stream. This is typically presented in the form of a complex, multisensory, and fast-moving web or network that contains innately understood and relevant geometric representations of specific and abstract concepts embedded into each and every one of the connecting points across the geometric forms.

The experience of these innately readable geometric representations consistently triggers one to visualize and physically feel the concept through highly detailed conceptual thinking. The ever-shifting mental and physical network follows the pace and rhythm of one's internal dialogue perfectly.

At the higher end of level 8B geometry, the effect retains its lower levels (described above) but expands itself to include the experience of subjectively perceiving, through innately readable geometric representations, the supposed architecture of subconscious neurological processes which are usually outside of one's normal daily perception or understanding. These processes are often interpreted to include concepts such as the architecture of one's neurology, memories, perspectives, emotions and general cognitive functions.

Level 8B geometry may feel capable of bestowing specific pieces of information onto substance users regarding the nature of reality and human consciousness through the simple experience of them. These specific pieces of information are usually felt and understood to be a profound unveiling of an undeniable truth at the time, but afterwards they are often found to be either ineffable or simply nonsensical and delusional.

Occasionally, however, genuine lessons or coherent messages are innately interpreted through this experience. It’s extremely important to note, however, that the scientific validity of these lessons is very uncertain and should never be immediately accepted as true without an extremely thorough and sober analysis after the experience.

It is worth noting that a greatly simplified and purely cognitive version of this effect is also capable of manifesting itself with no accompanying visual effects.

replication examples

Style variations

  • Intricate vs. simplistic - Geometry can either present itself as incomprehensibly intricate and complex in its appearance or simplistic, basic and comprehensible even at higher doses. For example, the geometry associated with dissociatives tends to be consistently overly simplistic in form while most psychedelics are significantly more intricate.
  • Algorithmic vs. abstract - Geometry can either appear to follow mathematical rules and logically consistent forms in its design (which often results in high amounts of fractals and semi-predictable shapes). In contrast to this, however, geometry can also be completely abstract or random in its appearance in a way that contains an infinite amount of completely unpredictable variety.
  • Organic vs. synthetic - Geometry can either feel subjectively organic and natural in its visual style, or it can feel synthetic and digital.
  • Unstructured vs. structured - Geometry can either present itself as completely disorganised and unstructured or it can form and condense into a variety of 3-dimensional mechanical and ever-shifting structures which are comprised out of and based upon condensed geometry.
  • Dimly lit vs. brightly lit - Geometry can either present itself as extremely dark and hard to make out from its background or, in contrast, it can be brightly lit and extremely easy to distinguish from its background. For example, the geometry associated with dissociatives tends to be consistently darker in appearance while most psychedelics are significantly brighter.
  • Multicoloured vs. monotone - The colour scheme that geometry follows can range from extremely varied and multicolored in style to consisting of little (if any) color variety such as greys, purples and blacks
  • Flat shading vs. glossy shading - The shading of geometry can either be flat, bright and simplistic or glossy with depth, gradients, highlights, and shading.
  • Sharp edges vs. soft edges - Geometry can have sharp edges which are extremely well-defined around its perimeter (sometimes with thick black outlines around its edges). In contrast to this, they can also be soft and blurred around the edges, merging seamlessly into each other in a manner which does not affect its intricacy.
  • Large vs. small - Regarding its size, geometry can be extremely large and zoomed in or fine and zoomed out in a way that does not affect its level of intricacy.
  • Fast vs. slow - In terms of its speed, geometry can shift and morph so fast into itself that the amount of information presented to the tripper in extremely short periods of time becomes incomprehensible to process. In contrast to this, they can move slowly and comprehensibly, swirling and shifting into themselves to present ever-changing geometric forms that can be observed at a much higher level of detail.
  • Smooth vs. jittery - In terms of its motion, geometry can move smoothly with a high frame rate, or it can be jittery in its motion with lag and a low frame rate.
  • Round corners vs. angular corners - Geometry can either have mostly rounded and circular corners or mostly sharp corners with sharp and angular geometry.
  • Non-immersive vs. immersive - Geometry can be manifested in front of one's face on a in a manner which feels separate and as if it was being presented on some screen without a distinct sense of size or distance attributed to it. In contrast, geometry can feel as if one is completely immersed in and surrounded by it with a distinct sense of attributed size and distance.
  • Consistent vs. progressive - Geometry can be manifested as consistent and steady in its intensity, complexity and visibility regardless of disturbances within the external environment. In contrast, however, it can manifest as progressive in its intensity which means that disturbances and sensory input such as bright lights, loud noises and distractions within the external environment will prevent or cut off the intensity, complexity and visibility from building up to its limit whilst darkness will cause it to steadily rise in complexity.
  • Level 8A vs. level 8B - At its eighth and highest level of experience, geometry is capable of branching off into two different directions of equal intensity. The first of these is Level 8A – exposure to semantic concept network and the second of these is Level 8B – exposure to the internal mechanics of consciousness.

psychoactive substances

Compounds which may cause this effect commonly include:

1P-LSD, 2-Fluorodeschloroketamine, 25B-NBOMe, 25C-NBOMe, 25D-NBOMe, 25I-NBOMe, 25N-NBOMe, 2C-B, 2C-B-FLY, 2C-C, 2C-D, 2C-E, 2C-I, 2C-P, 2C-T-2, 2C-T-7, 3-MeO-PCE, 3-MeO-PCMo, 4-AcO-DET, 4-AcO-DMT, 4-AcO-MET, 4-AcO-MiPT, 4-HO-DET, 4-HO-DPT, 4-HO-DiPT, 4-HO-EPT, 4-HO-MET, 4-HO-MPT, 4-HO-MiPT, 4-MeO-PCP, 5-MeO-DALT, 5-MeO-DiBF, 5-MeO-DiPT, 5F-PB-22, 6-APB, 6-APDB, AB-CHMINACA, AB-FUBINACA, ALD-52, Allylescaline, Ayahuasca, Benzydamine, Bk-2C-B, Bromo-DragonFLY, Bufotenin, Cannabis, DET, DMT, DOB, DOC, DOI, DOM, DPT, Deschloroketamine, DXM, Diphenidine, Efavirenz, Ephenidine, Escaline, Ibogaine, JWH-018, JWH-073, Ketamine, LSA, LSD, LSZ, MDA, MDMA, MET, MPT, Mescaline, Methallylescaline, Methoxetamine, Methoxphenidine, Mirtazapine, Nitrous, O-PCE, PCE, PCP, PRO-LAD, Proscaline, Psilocybin mushrooms, THJ-018, THJ-2201, ΑMT


Documentation written by Josie Kins