Bundle Adjustment Tutorial contribution

[lyf1436]

Hello,
I was trying to write a tutorial on fitting mesh and cameras simultaneously. I have already submitted a pull request Tutorial Please let me know if this seems be helpful. Thanks !

🚀 Feature

A tutorial on inverse rendering, where mesh and cameras are simultaneously fit from a set of multi-view images

Motivation

The current tutorials only contain solving camera from given mesh, and solving mesh from given cameras. The current 'Bundle Adjustment' tutorial has fairly limited scope. Only camera coordinates, no scene geometry is involved. I would like to contribute a tutorial that solves the mesh and cameras simultaneously, which is a true Bundle Adjustment

Pitch

This tutorial will help new users better understand Pytorch3D features.
It will also help users understand the power, simplicity, and limitation of using a naive approach for 3D reconstruction