Daedalus is the pathtracer that I was messing with after I got tired of Siren. It uses the same tile-based approach, and handles multiple different types of primitives for scene geometry. One of the limitations is that I never implemented any kind of BVH for it, which is a priority in Icarus. Even with this limitation, I've been pretty happy with some of the renders I've gotten out of it. You can find out more in the articles below: