Merge pull request #10120 from Citadel-Station-13/night_vision

Night vision trait but it just boosts barely-lit visibility

code/modules/mob/living/carbon/carbon.dm

@@ -598,6 +598,9 @@
 		sight |= E.sight_flags
 		if(!isnull(E.lighting_alpha))
 			lighting_alpha = E.lighting_alpha
+		if(HAS_TRAIT(src, TRAIT_NIGHT_VISION))
+			lighting_alpha = min(LIGHTING_PLANE_ALPHA_NV_TRAIT, lighting_alpha)
+			see_in_dark = max(NIGHT_VISION_DARKSIGHT_RANGE, see_in_dark)
 
 	if(client.eye && client.eye != src)
 		var/atom/A = client.eye
@@ -973,4 +976,4 @@
 /mob/living/carbon/transfer_ckey(mob/new_mob, send_signal = TRUE)
 	if(combatmode)
 		toggle_combat_mode(TRUE, TRUE)
-	return ..()
+	return ..()

code/modules/surgery/organs/eyes.dm

@@ -44,13 +44,9 @@
 			eye_color = H.eye_color
 		if(!special)
 			H.dna?.species?.handle_body() //regenerate eyeballs overlays.
-		if(HAS_TRAIT(H, TRAIT_NIGHT_VISION) && !lighting_alpha)
-			lighting_alpha = LIGHTING_PLANE_ALPHA_NV_TRAIT
-			see_in_dark = 8
 	M.update_tint()
 	owner.update_sight()
 
-
 /obj/item/organ/eyes/Remove(mob/living/carbon/M, special = 0)
 	clear_eye_trauma()
 	. = ..()