Skin not working in-game

So I am trying to put in a skin but for some reason when I go into the skin in-game and play, it does not show the correct skin. I put the skin file into the dance folder already. Any idea why this is?

Do you have reload the theme, change theme or relaunch the game and check noteskin loaded in the list?

Even Etterna client are based on SM5, I think not all of noteskins are compatible, e.g. you will see white dot if you’re trying to hide receptor (use Dark modifier), note explosion particle won’t show, etc.