"diffusion tensor tractography"

https://journals.plos.org/ploscompbiol/article?id=10.1371/journal.pcbi.1000395

"Based on their IQ test scores, all subjects were divided into general and high intelligence groups and significantly higher global efficiencies were found in the networks of the latter group. Moreover, we showed significant correlations between IQ scores and network properties across all subjects while controlling for age and gender. Specifically, higher intelligence scores corresponded to a shorter characteristic path length and a higher global efficiency of the networks, indicating a more efficient parallel information transfer in the brain. The results were consistently observed not only in the binary but also in the weighted networks, which together provide convergent evidence for our hypothesis. Our findings suggest that the efficiency of brain structural organization may be an important biological basis for intelligence."

Fractional anisotropy used for tissue integrity also has the opposite pattern as far as intelligence vs creativity goes.

https://psycnet.apa.org/record/2022-45679-001?doi=1

"These findings suggest that Big C creativity is associated with more “random” rather than more “efficient” global network functional architecture, with condition-dependent variations in local clustering and efficiency. Large condition-dependent correlations between global and local clustering measures deserve further examination in exceptionally creative and other groups to more fully characterize the functional topology of brain networks most relevant to creativity. (PsycInfo Database Record (c) 2022 APA, all rights reserved)"

"“Exceptional creativity was associated with more random connectivity at the global scale – a pattern that is less ‘efficient’ but would appear helpful in linking distant brain nodes to each other"

"“In terms of brain connectivity, while everyone else is stuck in a three-hour layover at a major airport, the highly creatives take private planes directly to a distant destination,” Anderson said. “This more random connectivity may be less efficient much of the time, but the architecture enables brain activity to ‘take a road less traveled’ and make novel connections"

There's also:

The Cambridge Handbook of the Neuroscience of Creativity (2018) Rex E. Jung (Editor), Oshin Vartanian (Editor)

Less travel among the network(s) pathway is better for intelligence

More travel among the network(s) path is better for creativity

Don't get why this is so shocking

In the brain, as far as neural pathways go, creative people have less efficient pathways, smart people have mostly efficient pathways.

It's any aspect of intelligence, the brain can generalize, mostly.

Creativity can be the combination of things not ever considered, it can also be how something is viewed or even what is viewed.

For example intelligence can be considered low in dimensions. It's straight forward computation. Creativity ups the dimensions per se. It allows a wider view or more dimensions of what is being looked at. One starts to see what others can't. Hence the quote: "talent hits a target others miss, genius hits a target no one else can see."

High creativity cannot exist without consciousness, and it's amplification and altering thereof.

(High) Fluid intelligence is measured by how much complexity can be dealt with in terms of patterns, sequences of elements, and depth to said elements and patterns (learn faster, learn more, learn what others can't).

Creativity is something else. It's related to consciousness, and altering it. When that happens, differing thought patterns emerge. Mental dispositions (disorders) are probably the strongest cases for this as well as drugs such as alcohol or psychedelics (discoverer of DNA strand). The risk is insanity at the extremes.

For just lower grades of creativity, personality features matter. Divergent thinking comes to mind as well.

In the brain they are also opposites, high intelligence means efficient networks. Highly creative persons have more of the opposite.

Getting them both is rare. Most smart people are just intelligent.