How do you undo a node group in Blender?

To undo a node group in Blender, you use the Alt+G shortcut, which effectively ungroups the nodes.

Here's a more detailed explanation:

When you "ungroup" a node group (also known as removing or breaking apart a node group), you're essentially dismantling the organizational structure you created. This process accomplishes the following:

• Removes the Group: The selected node group is eliminated as a single unit.
• Places Individual Nodes: The individual nodes that were inside the group are returned to your node editor workspace.
• Preserves Internal Connections: Crucially, the connections between the nodes that were inside the group are maintained. This is key because it ensures you don't have to rebuild the logic of your node setup.
• Allows External Connections: You can now freely connect these formerly internal nodes to other nodes existing in your workspace outside of the original group. This lets you integrate the functionality of the ungrouped node setup with the rest of your scene.

Steps to Ungroup:

1. Select the Node Group: In the Node Editor, select the node group you want to undo.
2. Press Alt+G: Press the Alt key and the G key simultaneously.

Alternatively, you can also:

1. Right-click on the node group.
2. Choose "Ungroup" from the context menu.

Why Ungroup?

Ungrouping is useful in several scenarios:

• Modifying the internal structure: You might need to add, remove, or modify connections within the node setup that was previously encapsulated within the group.
• Integrating with other nodes: You might want to connect nodes from the group to other parts of your node tree, establishing a more complex and interconnected network.
• Debugging: Ungrouping can help isolate problems within a complex node setup by allowing you to inspect and modify individual nodes.

In summary, Alt+G is your friend when you need to disassemble a node group and work with its constituent nodes directly.