Negative values on LineThickness for a SelectionBox allowed?


I expected negative values for LineThickness to not be allowed; however, it appears they are tolerated for whatever reason. Negative values behave very strangely and I’m not sure if it was intentionally designed to be this way.
Apparently, setting the LineThickness to: -(0.1)n, where n is a positive integer, it appears that
the selectionbox renders at roughly: 150
n studs away from the camera.

This is not limited to the studio camera, the same effects are shown in a live game.

repro.rbxl (18.5 KB)


1. Insert part with a SelectionBox
2. Set Adornee to said part
3. Set LineThickness to -0.1
4. Move the camera roughly 150 studs away (or more), and the selectionbox will render

These steps reproduce the issue 100% of the time, regardless of the place of time of reproduction.

Images from repro file in studio:


Images from a live and published game of the reproduction file:

1 Like

Thanks for the report! We’ve filed this internally and we’ll follow up here when we have an update for you.

I am in the process of checking over bug reports and following up on some bugs that haven’t received any activity in a while.
Is this issue still occurring or can you confirm that this bug has been resolved?