In another interlacing tip, we discussed how to create the illusion of faster download rates by creating interlaced GIFs and PNGs. Interlaced images immediately display a low-resolution image and gradually build to the full-resolution image.

However, interlaced images are not the perfect solution. Interlacing an image can slightly increase file size. In addition, some older browser versions do not properly display interlaced images.

In other scenarios, interlaced images offer no benefit. For example, since background images or table background images won't display until the image is completely downloaded, interlacing a background image serves no purpose.

Therefore, keep interlaced GIFs or PNGs in mind for Web graphics, but limit their use to simple graphics displayed in an HTML page.