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I'm trying to distribute instances of a cube around the cube, I aligned them to the normal of the base mesh, but I can't figure out how to remove instances that in the edges of the cube.

instances of cube in the edges

One clue that could help is when I use the normal to scale the instances it seems to only choose the problematic instances.

using the normal to scale the instances

From what I understand, this happens because perfectly aligned normal have at least 1 of their XYZ coordinates to zero, scaling one of their components to zero essentially removes them.

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While writing this, I figured out cumbersome a way to accomplish by comparing the normal of the vertices to zero. If 2 of the normals are zero then select it.

Removing vertices Solution

Is there a better way to do this? I feel like this solution is cumbersome 😅

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