It is really very interesting graphic mode I am goinng to play with it forever.
I have an idea, if biters are absorb the radiation so can it be that their blood can shine a little in dark, perhaps it will look nicer.
And one request for you, if you are working on biters' corpses can you do that their corpses will disappear after their death more quickly? Me and a lot of my friends gets a big annoy that we can't see all the structures that biters destroyed because of their corpses so we can't rebuild ruined area because we don't see it

actually there is a setting to adjust corpse duration