Fit Perspective grid to specific object (not the other way round)

The object in your example is isometric. The perspective grid cannot do isometric.

Simple as that. It's not possible.

To create isometry, you usually perform a series of certain transformations. Or use plugins or actions.

https://exchange.adobe.com/apps/cc/16059/nimbling-ssr30 

Hi @juj88675598

Thanks for reaching out! In this video, the background object is locked, and the presenter is creating a perspective aligned with that object. Later, additional objects will be placed within the perspective. Could you share more details about where you're encountering difficulties?

Regards,

Srishti