Photon mapping ray tracer

We were required to write a photon mapping ray tracer for a class I'm taking this semester, Advanced Computer Graphics. Here's a picture my photon mapper generated:

I really need some new sprites

A visualization of some photons traced:

I really need some new sprites

Some photons stored at surfaces:

I really need some new sprites

Just the indirect lighting:

I really need some new sprites

Some other renders:

I really need some new sprites

I really need some new sprites