how do you consistently make particles be seeable through walls??

https://preview.redd.it/4y58vuvrc7jh1.png?width=426&format=png&auto=webp&s=d90ecd5542d69bc6d2194051779ea6f43e1d388a

Im trying to make a "Scan" thingy for my moveset, and i ran into a bit of an issue, i kinda know how to make it, but i just cant find the right adjustments for it, it most of the time only works on VERY thin walls, ive only gotten the right combination ONCE, but i was stupid and deleted it because i wanted to rescale the actual particle, can someone help?????