Hi carsonp,

The HLD program has not a Material Modifier Power Tool, however, you can use the following tools / steps
Design --> Launch Power Tool--> Punch Photo Viewer--> with this tool you can use almost the same feature you used in the Material Modifier--> File--> save as BMP--> Save your modified picture--> In main program--> File--> Import--> Material to library--> Import your picture--> Save to library

In the material modifier or with Photo viewer--> you can change the texture color--> trace a rectangle or square on the texture as a color object--> choose the right color on the color bar--> save the new texture to library

Patricia