Help with a pixel effect

Im trying to make a pixel effect only effect objects WITHOUT certain tags (applying a certain layer could work if needed). As of now Im using a render texture with a lower resolution on a canvas.
Images for reference, i can provide more if needed,

(the cube on left and right is the ones i want un-pixelated)
Thanks in advance.

You can just use camera stacking. Camera’s can already filter by layer, so you can have one layer for your pixelly stuff. Render that to a render texture. Put the texture on a quad and use the other camera to render that and everything else.