I think I am getting somewhere. I added the three directional glows to the sphere using Child Actors
Now, I can see the glow for the XY plane:
A few issues:
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The other planes do not have a glow.
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I can only see the glow looking up from below the object.
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I set the color of the glow to blue, but it is still showing white. Here are the color settings:
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The glow is rectangular. I want it to follow the shape of the sphere.

