diff --git a/modular_citadel/cit_turfs.dm b/modular_citadel/cit_turfs.dm
new file mode 100644
index 0000000000..7487747cbf
--- /dev/null
+++ b/modular_citadel/cit_turfs.dm
@@ -0,0 +1,45 @@
+//Yes, hi. This is the file that handles Citadel's turf modifications.
+/turf/open/floor/Entered(atom/obj, atom/oldloc)
+	. = ..()
+	CitDirtify(obj, oldloc)
+
+//Baystation-styled tile dirtification. Except 31 lines more complex than it probably has to be.
+/turf/open/floor/proc/CitDirtify(atom/obj, atom/oldloc)
+	if(prob(50))
+		if(has_gravity(src) && !isobserver(obj))
+			var/dirtamount
+			var/obj/effect/decal/cleanable/dirt/dirt = locate(/obj/effect/decal/cleanable/dirt, src)
+			if(!dirt)
+				dirt = new/obj/effect/decal/cleanable/dirt(src)
+				dirt.alpha = 0
+				dirtamount = 0
+			dirtamount = dirt.alpha + 1
+			if(oldloc && istype(oldloc, /turf/open/floor))
+				var/obj/effect/decal/cleanable/dirt/spreadindirt = locate(/obj/effect/decal/cleanable/dirt, oldloc)
+				if(spreadindirt && spreadindirt.alpha)
+					dirtamount += round(spreadindirt.alpha * 0.05)
+			dirtamount = min(dirtamount,255)
+			var/mob/living/carbon/human/H = obj
+			if(H && istype(H, /mob/living/carbon/human))
+				var/obj/item/clothing/shoes/S = H.shoes
+				if(S && !(S.blood_state == BLOOD_STATE_NOT_BLOODY))
+					if(!dirt.atom_colours || !dirt.atom_colours.len)
+						dirt.add_atom_colour(color_matrix_identity(), FIXED_COLOUR_PRIORITY)
+					var/list/origdirtcolor = dirt.atom_colours[FIXED_COLOUR_PRIORITY]
+					var/list/colordirt = color_matrix_identity()
+					switch(S.blood_state)
+						if(BLOOD_STATE_HUMAN)
+							dirt.remove_atom_colour(FIXED_COLOUR_PRIORITY)
+							colordirt = list(0,0,0,0, 0,-0.15,0,0, 0,0,-0.15,0, 0,0,0,0, 0,0,0,0)
+							dirt.add_atom_colour(color_matrix_add(origdirtcolor, colordirt), FIXED_COLOUR_PRIORITY)
+							dirt.alpha = dirtamount
+						if(BLOOD_STATE_XENO)
+							dirt.remove_atom_colour(FIXED_COLOUR_PRIORITY)
+							colordirt = list(-0.15,0,0,0, 0,0,0,0, 0,0,-0.15,0, 0,0,0,0, 0,0,0,0)
+							dirt.add_atom_colour(color_matrix_add(origdirtcolor, colordirt), FIXED_COLOUR_PRIORITY)
+						if(BLOOD_STATE_OIL)
+							dirt.remove_atom_colour(FIXED_COLOUR_PRIORITY)
+							colordirt = list(-0.15,0,0,0, 0,-0.15,0,0, 0,0,-0.15,0, 0,0,0,0, 0,0,0,0)
+							dirt.add_atom_colour(color_matrix_add(origdirtcolor, colordirt), FIXED_COLOUR_PRIORITY)
+			dirt.alpha = dirtamount
+	return TRUE
\ No newline at end of file
diff --git a/tgstation.dme b/tgstation.dme
index e5d267b667..1634290742 100755
--- a/tgstation.dme
+++ b/tgstation.dme
@@ -2402,4 +2402,5 @@
 #include "interface\skin.dmf"
 #include "modular_citadel\cit_medkits.dm"
 #include "modular_citadel\cit_screenshake.dm"
+#include "modular_citadel\cit_turfs.dm"
 // END_INCLUDE