PNG images with transparent backgrounds allow the shadow to appear naturally around your subject. For JPG images, the shadow will be added around the rectangular image borders.
Use a higher Y offset with moderate blur to create the illusion that your image is floating above the surface. A 0,15 offset with 25px blur creates a nice floating effect.
Yes! Colored shadows can create unique artistic effects. Try using a color that complements your image for a modern, stylized look often seen in app marketing materials.