This is the final post about mixing images, where colored gels have been employed, with the Photo Filters found in Photoshop. This is the final image of our model Tiffany with a green-gelled flash illuminating the wall behind her:
A Deep Blue Photo Filter was added:
The Deep Blue filter pretty much neutralizes the green. Here is a semi-black and white version:
In this instance, the layer opacity of the black and white layer was set to 60%.