Looks great, maybe you could find a way to integrate it with Blender and make a Renderer as a plugin. Does it do SSGI for diffuse rays? Anyway I know it's a lot of work so kudos.
Currently all GI is handled using virtual point lights but SSGI is something I would like to add as a complementary method. I want to say that Godot does something like that where they have a heavyweight solution and couple it with SSGI to enhance it.