How to get a light foggy look in photoshop @user1676691 Select "Brush Tool" and right click on canvas. In popup change hardness to 0, and size to "halfsize-fullsize of canvas". On a new layer click 1 time with activated brush tool and play with opacity, layer blending mode and position of this layer.
Logo design : 300dpi Issues Can you provide a little more information: in which software you have created logo? If it in illustrator - uncheck "View - Pixel Grid"