QuickMat is particularly helpful if you are using P5 and use a lot of skin and other nodes that do not show up until rendered. QuickMat lets you render before creating the thumbnail picture. It is also easier to select individual body parts (like face, eyes, etc.) than in MAT Pose Creator. QuickMat lets you select or deselect body parts while MAT Pose Creator (at least the last free version I used) only lets you delete the unwanted ones. You have to reload the figure to change body parts.