
So to sum up what I found.
Adams way of using screens had some draw backs. First if the light source was the complementary color of the native color it would make it to bright. So I set out looking at all of the photoshop blend modes. I also wondered what 3d engines did to render out a scene. I wikipedia'd it until I found some answers. And these are the different steps in the rendering mode.
First is the local color of the object. This is an intense pure scan of your skin, usually this color is quite light and bright. For example if your shirt was red you would use pure red, no thoughts to shadow just pure color.
Second is the Ambient light. This basically determines the darkest dark for each color in your picture. It simply represents light bouncing around creating ambience.... I think ;) .
Third is your diffused light. This is what gives your object form.
Fourth is your specular light. Objects either absorb light or reflect it. Specular is used to fill the need of reflective light. A good example of this are leaves. If you look at the sun through a leaf its an intense yellow green, where as, if you look on the side the sun is shinning on its a lot cooler almost blue. This is because the light is reflecting back to you, giving you a reflection of light not diffusion of light.
And that is it.
Pretty simple. Now lets explain how photoshop can tackle each of these steps.
I did a skull study with this technique. And here are the layers.
The first layer is the local color of the skull, and its blend mode set to normal.


This is the Ambient light Layer. I took this hex color #070300 and bucket filled the layer and set the blend mode to Multiply. I then set the layer opacity to about 86%. I usually stay within 80-90% opacity on all ambient layers.

I then turn off all other layers and define the first diffused light source by drawing a value study of the skull with the light coming in at angle from the top. I stayed with in a 9 value scale. Remember not to think about reflective light just one light source at a time. This technique will do all the hard work of mixing colors for you.



This is the Ambient light Layer. I took this hex color #070300 and bucket filled the layer and set the blend mode to Multiply. I then set the layer opacity to about 86%. I usually stay within 80-90% opacity on all ambient layers.

I then turn off all other layers and define the first diffused light source by drawing a value study of the skull with the light coming in at angle from the top. I stayed with in a 9 value scale. Remember not to think about reflective light just one light source at a time. This technique will do all the hard work of mixing colors for you.


Next I do a value study of the second diffused light coming in from the bottom-left side. I turn off all the layers at this point and just do a simple value study again of the skull.


Now if you want to change the color of the light source push ctrl+u and select colorize and then mess with that until you get the light that you want. I did this for this light source by changing it to a blue light.

Next I turn on all the layers including the first light source, and place this layer on top of the first light source and change the blend mode to color dodge as well and wala. We get all the color subtleties of reality.

Now I didn't even use the fourth step of specular light. If you wanted to use this step you would do a value study of the light like I did on the other light source steps but change the blend mode to lighten and adjust the opacity to the needs of reflection.
Well I hope this helps the creation process. Good luck and go try it.

Next I turn on all the layers including the first light source, and place this layer on top of the first light source and change the blend mode to color dodge as well and wala. We get all the color subtleties of reality.

Now I didn't even use the fourth step of specular light. If you wanted to use this step you would do a value study of the light like I did on the other light source steps but change the blend mode to lighten and adjust the opacity to the needs of reflection.
Well I hope this helps the creation process. Good luck and go try it.






































