One quite recent addition to the game are blood splatters on level geometry. This feature has actually been considered for a long while, but for many reasons it was never implemented. Until, one day, it was.
Being able to redecorate the environments with a thick layer of red, as strange as it may seem, had the effect of making them seem more solid and physical, and a more effective playground for Dudebro to unleash his arsenal in.
The algorithm used for the procedural generation of bloodstains is quite complex, and its gory effects can be seen in motion in a separate update.