to
or
in The GIMP.
-Comments are love.
1. Take your base in the GIMP.
2. Duplicate the base layer and set the blending mode to 'screen'. Make the opacity 43.5 percent.
3. Paste this texture by
taffee_icons onto your image. Set the blending mode to 'soft light'.
4. I added a bit of text and brushed some white.
5. For a more dramatic blue, paste the texture on again and set it to 'soft light'.