POLARIS: Shuttle floor decals go with the shuttle

code/_helpers/unsorted.dm

@@ -792,6 +792,7 @@ proc/GaussRandRound(var/sigma,var/roundto)
 						var/old_icon1 = T.icon
 						var/old_overlays = T.overlays.Copy()
 						var/old_underlays = T.underlays.Copy()
+						var/old_decals = T.decals ? T.decals.Copy() : null
 
 						X = B.ChangeTurf(T.type)
 						X.set_dir(old_dir1)
@@ -799,6 +800,9 @@ proc/GaussRandRound(var/sigma,var/roundto)
 						X.icon = old_icon1
 						X.overlays = old_overlays
 						X.underlays = old_underlays
+						X.decals = old_decals
+						if(old_decals)
+							X.apply_decals()
 
 					//Move the air from source to dest
 					var/turf/simulated/ST = T
@@ -824,9 +828,11 @@ proc/GaussRandRound(var/sigma,var/roundto)
 
 					else if(turftoleave)
 						T.ChangeTurf(turftoleave)
+						T.apply_decals()
 
 					else
 						T.ChangeTurf(get_base_turf_by_area(T))
+						T.apply_decals()
 
 					refined_src -= T
 					refined_trg -= B