Decals of freckles on the face divided into layers. You can set them up together using any image editing software or internally using a plugin like Decal Maker.

At first I was trying to bake some combinations together, but the results were working well on some skins but not on others. So I decided to approach the situation in a different way; in this case, using something I had done on some previous decals... 

Instead of making my own combinations geared towards specific skins, I split the decals into layers and leave the customization to the users. That way you can set the opacity of each layer as you see fit, turn on or off any layer you want, as well as set them in whatever order you prefer.

Recommended Plugins:

Chokaphi's Decal Maker: Extremely recommended to load the layers of this specific decal, in addition to allowing the configuration of the opacity of each layer.

Notes:

These textures were baked using the Female Base textures as a base, so they might not work very well on textures based on other models.

The VAR Freckles_Face contains 6 decals:

...\Textures\CasuaLooks\Freckles\Face\faceDecal_Freckles_Face_L1.png

...\Textures\CasuaLooks\Freckles\Face\faceDecal_Freckles_Face_L2.png

...\Textures\CasuaLooks\Freckles\Face\faceDecal_Freckles_Face_L3.png

...\Textures\CasuaLooks\Freckles\Face\faceDecal_Freckles_Face_L4.png

...\Textures\CasuaLooks\Freckles\Face\faceDecal_Freckles_Face_L5.png

...\Textures\CasuaLooks\Freckles\Face\faceDecal_Freckles_Face_L6.png

The "L" in the filenames is related to the recommended order for the texture to be loaded in the [plugin/image editor]. But at the same time, I also recommend that you experiment with different orders and try more varied customizations.

Archive: LINK

Supporters Archive: LINK

Work in Progress: LINK

Board of Suggestions: LINK