Tip Images
Tip images are included to give the user a more visually accurate view of the icon they are selecting. They show when the user "hovers" over the icon in Daz Studio.
{width="6.492071303587052in" height="5.264583333333333in"}
How to include "tip" images
Simply save a version of your icon image at 256 x 256. This larger icon should be named the exact same as your duf and icon image. You can then save a copy as 91 x 91 for the normal icon.
example.duf example.png example.tip.png
It is included in the folder with your duf and png icon.