Soft focus I did was creating a new (non-adjustment) layer, setting low opacity and gassian bluring it.
Rules state:
Layers: Only Adjustment Layers (or the non-Photoshop equivalent) may be used. An Adjustment Layer is one that does not contain any pixel data, but rather is a special, non-image layer that lets you experiment with color and tonal adjustments to an image without permanently modifying the pixels. Adjustment Layers must be applied in Normal mode. All other types of layers (including those that contain pixel data or masks) and all other blending methods (modes) are prohibited. Changing the opacity of an Adjustment Layer is permitted. |