How to prevent object scaling when mouse scale? Like a universal attenuated object

I make a trackball when user click onto it, and I want to make sure that user can see it clearly both in bird eye map, and first person viewport.

First of all: Hello! :slight_smile:
If I got you correctly, then have a look at that SO answer.
If Iā€™m wrong, then add some explanatory pictures to your question.

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@prisoner849 thank you very much! that works by setting a proper factor for distance from camera to the target. And it is simple.