To make an artificial Christmas tree look fuller, you can try the following techniques:
1. Add lights: Adding lights to the tree can help fill out the gaps and create a more realistic and festive look.
2. Use garland: Wrap garland around the branches of the tree to fill in any gaps and add texture and depth.
3. Add ornaments: Adding ornaments to the tree can help fill out the branches and add a pop of color and personality.
4. Fluff the branches: Gently fluff the branches of the tree to give them a fuller look and make them more lifelike.