Photoshop's ability to apply effects to layers is one of the reasons Photoshop is such a versatile tool. GIMP also has this ability but Layer Styles in Photoshop are Layer Effects in GIMP.

GIMP, an open-source image editor, doesn't support editing of DDS files by default, but installing the GIMP DDS plugin makes the program DDS-compatible.

Our layer is completely neutral gray at this point, so there is no visible difference from the background image. With the Film Grain layer selected in the Layers dialog, bring up the Scatter HSV ...