how can i fix my particle pixelated borders?

[shell charm]

hello! im having problems with previewing the black particle correctly (its a single partle inside a PS), as the edges appear pixelated and v ugly while in the editor preview it looks good
i have the post processing option on with anti-aliasing in the camera, so i dont know what to do to solve it :')

[flint pike]

you need to change that on the material that you assigned to your particle

it has to be metalic > transparent > then one of these blending modes that show up