How to use ps to synthesize the depth of field of landscape photos and break through the photography limit

In short, it is to imitate the working mode of the light field camera to expose the focus, that is, after selecting the position, it is best to expose it on the shelf, and then rotate the focal length at a certain distance to take a series of photos. Finally, in PS, aim at the focus from far and near, stack these photos into multi-layer photos from bottom to top (generally 2-3 photos are enough), then erase the pictures outside the depth of field with the eraser tool, exposing the pictures in the depth of field at the same position in the lower layer, and so on. It should be noted that when each floor