The mountains and the caverns (no replies)

Do pyramids seek to recreate ancient reverence for a mountain and caverns?

There doesn't seem to be much difference between a mountain and its caves that can sometimes be adorned with artistic wall paintings, and a pyramid with levels of passages and chambers either beneath or within... with or without artistic renditions upon walls.

In their initial construction, does a pyramid seek to recreate a mountain?

Please consider the importance of a cave and its possible system beyond the first chamber, and how pyramids evolved.

Sure, 'mystical' attributes to a pyramid's construction may have given way to simple tombs with the 'mystical' adorned upon the walls later, but are we looking at that as a reverse?

Didn't artistically adorned caves come first?

Thanks