# Day 4 of Sprited

Okay, here we go. It’s the end of Week 1.

* Added [**Photon Transport**](https://en.wikipedia.org/wiki/Monte_Carlo_method_for_photon_transport) simulation into Machi ([PR](https://github.com/kndlt/machi/pull/12)).
    
* Added Foliage system into Machi ([PR](https://github.com/kndlt/machi/pull/10)).
    
* Dirt now seeps water and able to grow foliage on top of it.
    

I was hoping I could have AI agents building things by the end of this week, but I couldn’t get to it. I do need to figure out the focus areas.

%[https://youtu.be/Ze_f50rgpZQ]