There's three versions of this model:

1. The “no background” version has no background, meaning that the three inner lines are separate parts when printed.
2. The “picture frame” version has a square background, so you can use a color change to put the molecule model inside a square picture frame. Scale the model as needed to fit your picture frame.
3. The “one piece” version only has a background layer behind the molecule itself. This version is most suited for wall decoration, as it ensures that the three inside lines stay in the correct position.

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