You want to create a circular light when you hover your mouse over a mesh that has nothing.
What should I refer to?
mouse hover befor
mouse hover after
Some suggestions
you can use actions for onhover
create a transparent tube or tube with transparent texture to show on hover
you can also look at mesh highlights
or the glowlayer
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If I can allow myself, it would be best if you could make a single post for a same topic and have all information in the same post. As far as I recall, initially, you wanted to create a holo effect (I assumed using the 3D GUI). Is this fixed now?, I don’t know…
We are trying to keep the forum somewhat organized. Not to mention you will get faster and more accurate answers if you keep everything from a same issue/question in a single post. Thanks for your understanding and glad to see you here. Please keep with this energy 
Linked to I want to create a hologram effect
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I didn’t know you deleted the previous post
Thank you for your advice! I’ll refer to it.
I didn’t delete the post and BtW posts can only be deleted by the creator.
All I did is to add the link to it so people know it’s related.