* ui
	* design & implement a ui engine
	* separated logic & rendering & event handling
* phx
	* implement a 2D physics engine
* gfx
	* add more pixmap fonts
	* painter should be 2D only, make a separate 3D painter
	* implement proper .OBJ loader (with materials & vertex sharing)
	* deferred renderer
		* cascaded shadow maps
		* CPU frustum culling
		* solve banding issues
		* figure out better light volumes clipping
		* transparent objects
		* get rid of diffuse materials
		* find a better specular model (Blinn-Phong seems to over-shine the specular highlight)