A very important part of creating CG images is the post work. With this image, I need to correct the colour range of the image in Photoshop. OK, so our images have come straight out of 3DS Max. As you may have noticed, the image has a very dominating blue tint, and in the next few steps we need to correct that (Fig.32). First of all we add a threshold modifier to the image (Fig.33). After that we move the slider to the left side. Now you can see that only the darkest parts of the image are remaining. Hold down the Shift key (the mouse icon changes into a cross) and select the darkest area (Fig.34). Now move the slider in the opposite direction and do the same. You should now see two crosses, marked with "1" and "2". Hit the cancel button. OK, now we have set the range for the white and the black points. Now it's time to select the midtones (grey). Add a layer on top of it and fill it with 50 percent grey and set the layer blending to "different". After that add a threshold modifier again to the new layer. Now move the Slider to the left. The remaining colours you should see are grey. Hold down the Shift key and select them again. Finally press the cancel button again. You should now have 3 crosses, marked from "1" to "3" and you can now delete the new layer (Fig.35). Now it is time to add a Curve Modifier to the image. Under the button "Option" you see 3 icons for the eyedropper tools. The first is for the black points, second for grey, and the third for the white points. Select them in that order. To select them you have to hold down the Shift key or press Caps Lock on your keyboard (your cursor will change into a cross) (Fig.36). Now hit OK, and you will see the colour corrected image. (Fig.37)
I hope you have enjoyed reading through this brief project overview. If you have any questions, please don't hesitate to contact me. You can see more images on my website and can also download the discussed shaders.