I can't get inside fog

Hello, I create a particle fog but my player can’t throug that? As the player tries to get into the fogs, the fogs move away. Video is here;

Your link led me to a comment of yours, that led me to the video you likely followed. And briefing over it, I noticed this part seems to answer your question, where he manipulated Alpha values:

Thx my friend. but there is no problem with alpha values…