Fix slime hair translucent (#14478)

* fix

* move

Content.Shared/Humanoid/Markings/MarkingManager.cs

@@ -166,10 +166,9 @@ namespace Content.Shared.Humanoid.Markings
             return true;
         }
 
-        public bool MustMatchSkin(string species, HumanoidVisualLayers layer, IPrototypeManager? prototypeManager = null)
+        public bool MustMatchSkin(string species, HumanoidVisualLayers layer, out float alpha, IPrototypeManager? prototypeManager = null)
         {
             IoCManager.Resolve(ref prototypeManager);
-
             var speciesProto = prototypeManager.Index<SpeciesPrototype>(species);
             if (
                 !prototypeManager.TryIndex(speciesProto.SpriteSet, out HumanoidSpeciesBaseSpritesPrototype? baseSprites) ||
@@ -179,9 +178,11 @@ namespace Content.Shared.Humanoid.Markings
                 !sprite.MarkingsMatchSkin
             )
             {
+                alpha = 1f;
                 return false;
             }
             
+            alpha = sprite.LayerAlpha;
             return true;
         }
     }

Content.Shared/Humanoid/Markings/MarkingsSet.cs

@@ -190,9 +190,9 @@ public sealed class MarkingSet
                 foreach (var marking in list)
                 {
                     if (markingManager.TryGetMarking(marking, out var prototype) &&
-                        markingManager.MustMatchSkin(species, prototype.BodyPart, prototypeManager))
+                        markingManager.MustMatchSkin(species, prototype.BodyPart, out var alpha, prototypeManager))
                     {
-                        marking.SetColor(skinColor.Value);
+                        marking.SetColor(skinColor.Value.WithAlpha(alpha));
                     }
                 }
             }