Added the status unlockable for path in skill-tree.yml (Check wiki), make sure to reload gui/skill-tree.yml to benefit from this modification.

MMOCore-API/src/main/java/net/Indyuce/mmocore/gui/skilltree/display/PathStatus.java

@@ -3,5 +3,6 @@ package net.Indyuce.mmocore.gui.skilltree.display;
 public enum PathStatus {
     LOCKED,
     FULLY_LOCKED,
+    UNLOCKABLE,
     UNLOCKED;
 }

MMOCore-API/src/main/java/net/Indyuce/mmocore/skilltree/SkillTreePath.java

@@ -7,9 +7,14 @@ import net.Indyuce.mmocore.skilltree.tree.SkillTree;
 public record SkillTreePath(SkillTree tree, IntegerCoordinates coordinates, SkillTreeNode from, SkillTreeNode to) {
 
     public PathStatus getStatus(PlayerData playerData) {
-        if (playerData.getNodeStatus(from) == NodeStatus.UNLOCKED && playerData.getNodeStatus(to) == NodeStatus.UNLOCKED) {
+        NodeStatus fromStatus = playerData.getNodeStatus(from);
+        NodeStatus toStatus = playerData.getNodeStatus(to);
+        if (fromStatus == NodeStatus.UNLOCKED && toStatus == NodeStatus.UNLOCKED)
             return PathStatus.UNLOCKED;
-        }
+        if ((fromStatus == NodeStatus.UNLOCKABLE && toStatus == NodeStatus.LOCKED) || (fromStatus == NodeStatus.LOCKED && toStatus == NodeStatus.UNLOCKABLE))
+            return PathStatus.UNLOCKABLE;
+        if (fromStatus == NodeStatus.FULLY_LOCKED || toStatus == NodeStatus.FULLY_LOCKED)
+            return PathStatus.FULLY_LOCKED;
         return PathStatus.LOCKED;
     }
 

MMOCore-Dist/src/main/resources/default/gui/skill-tree.yml

@@ -123,6 +123,28 @@ display:
       default:
         item: "WHITE_DYE"
         custom-model-data: 0
+    unlockable:
+      up:
+        item: "BLUE_DYE"
+        custom-model-data: 0
+      up-right:
+        item: "BLUE_DYE"
+        custom-model-data: 0
+      up-left:
+        item: "BLUE_DYE"
+        custom-model-data: 0
+      down-right:
+        item: "BLUE_DYE"
+        custom-model-data: 0
+      down-left:
+        item: "BLUE_DYE"
+        custom-model-data: 0
+      right:
+        item: "BLUE_DYE"
+        custom-model-data: 0
+      default:
+        item: "BLUE_DYE"
+        custom-model-data: 0
     locked:
       up:
         item: "GRAY_DYE"

MMOCore-Dist/src/main/resources/default/skill-trees/combat.yml

@@ -551,6 +551,28 @@ paths:
 #      default:
 #        item: "WHITE_DYE"
 #        custom-model-data: 0
+#    unlockable:
+#      up:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      up-right:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      up-left:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      down-right:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      down-left:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      right:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      default:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
 #    locked:
 #      up:
 #        item: "GRAY_DYE"

MMOCore-Dist/src/main/resources/default/skill-trees/general.yml

@@ -522,6 +522,28 @@ nodes:
 #      default:
 #        item: "WHITE_DYE"
 #        custom-model-data: 0
+#    unlockable:
+#      up:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      up-right:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      up-left:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      down-right:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      down-left:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      right:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      default:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
 #    locked:
 #      up:
 #        item: "GRAY_DYE"

MMOCore-Dist/src/main/resources/default/skill-trees/mage-arcane-mage.yml

@@ -493,6 +493,7 @@ nodes:
 
 
 
+
 # This section is to have a specific display for the skill tree in the GUI.
 # It is optional as if you don't fill it the config in gui/skill-tree.yml will be used.
 # For each node it will first look if the node has a specific display, if not it will look if
@@ -522,6 +523,28 @@ nodes:
 #      default:
 #        item: "WHITE_DYE"
 #        custom-model-data: 0
+#    unlockable:
+#      up:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      up-right:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      up-left:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      down-right:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      down-left:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      right:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      default:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
 #    locked:
 #      up:
 #        item: "GRAY_DYE"

MMOCore-Dist/src/main/resources/default/skill-trees/rogue-marksman.yml

@@ -489,6 +489,7 @@ nodes:
 
 
 
+
 # This section is to have a specific display for the skill tree in the GUI.
 # It is optional as if you don't fill it the config in gui/skill-tree.yml will be used.
 # For each node it will first look if the node has a specific display, if not it will look if
@@ -518,6 +519,28 @@ nodes:
 #      default:
 #        item: "WHITE_DYE"
 #        custom-model-data: 0
+#    unlockable:
+#      up:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      up-right:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      up-left:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      down-right:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      down-left:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      right:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      default:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
 #    locked:
 #      up:
 #        item: "GRAY_DYE"

MMOCore-Dist/src/main/resources/default/skill-trees/warrior-paladin.yml

@@ -517,6 +517,28 @@ nodes:
 #      default:
 #        item: "WHITE_DYE"
 #        custom-model-data: 0
+#    unlockable:
+#      up:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      up-right:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      up-left:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      down-right:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      down-left:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      right:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
+#      default:
+#        item: "BLUE_DYE"
+#        custom-model-data: 0
 #    locked:
 #      up:
 #        item: "GRAY_DYE"