The perspective CSS property is used in 3D transformations to create a sense of depth and three-dimensionality. It defines the distance between the viewer and the 3D transformed elements, determining the intensity of the perspective effect.

The perspective property accepts length values, representing the distance from the viewer to the transformed elements. It can be specified using pixels (px) or other CSS length units.

Here’s an example:

.container {
  perspective: 1000px;

In this example, the .container class sets a perspective of 1000px, which means the viewer is positioned 1000px away from the transformed elements. This creates a moderate perspective effect, making the elements appear closer or farther based on their 3D transformation.

By adjusting the value of perspective, you can change the intensity of the perspective effect. A larger value, such as 2000px, will make the elements appear flatter and farther away, while a smaller value, such as 500px, will make them appear closer and more pronounced.

It’s important to note that the perspective property is typically used in conjunction with other 3D transformation properties, such as transform and transform-style, to create complex 3D effects and animations.

The perspective property is commonly used in CSS 3D transformations to add depth and realism to elements, allowing for the creation of immersive 3D experiences on the web.