| Make a copy of the source image.
Desaturate it or make it grayscale by whatever means you like best.
Create a Levels adjustment layer above that and adjust the levels to taste.
Create a new layer above the adjustment layer.
Fill it with red.
Change the layer blend mode to COLOR or HUE.
Apply a layer mask to hide all.
Using a white brush, paint in the layer mask anywhere you want something to be red.
--Racc |