Making shadow not appear on part with decals

I need for the shadow to not appear on the part with decals on all sides itself. No, not the CastShadow boolean, I mean that the part appears to have no shadow on itself. I’ve tried setting the transparency of the part to 1, but it seems to still have that shadow.
2024-07-03_12-24-34
Can you find a way to do this?

Have you tried setting the parts material to neon?

Yes, and sadly it doesn’t work.
2024-07-03_12-40-11

Is it possible to use a BillboardGui somehow?

maybe try using an inverted sphere?