Particles visible through walls ?

Hello everyone,

I'm trying to make an item that acts like an xray:
You activate it and then you should be able to find different ores in a 6x6x6 area.

This should work like the "Dragon Eye" of the famous "Trinkets and Baubles" mod

Almost everything works fine:
1) I'm able to use keybind to select the wanted ore
2) I'm able to find selected ore in the 6x6x6 area around me

Now I would like to add some particles on these blocks that can be seen through walls, or to highlight them through walls, but here I have absolutly no idea how to manage it.

Any idea ?

I'm very new to modding and MCreator (I first tried it yesterday) so don't hesitate to give me a lot of details :)
I'm using MCreator 2021.2 with 1.16.5 generator

Thank you !