It also involves groups of objects appearing denser as they move further away.
Additionally, it could be explained by noticing a certain amount of detail depending on how close something is, giving a sense of depth perception.
There are three main forms of texture gradient: density, perspective, and distortion of texture elements.
Texture gradient is carefully used in the painting Paris Street, Rainy Day by Gustave Caillebotte.
[3] In 2000, a paper about the texture gradient equation, wavelets, and shape from texture was released by Maureen Clerc and Stéphane Mallat.