Check the interface contact area, I think you can right click on pair now 
and check. The walls are for when the surface pairs aren't in contact. I assume you didn't set "coupled wall" when you set them up? Â
We have an exciting announcement about badges coming in May 2025. Until then, we will temporarily stop issuing new badges for course completions and certifications. However, all completions will be recorded and fulfilled after May 2025.
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