Dimitar Ivanov Katerov with a quick tip showing how to alter some lighting information by the use of the black and White Adjustment in Photoshop, which will allow you to change a 3D render by tweaking the lighting range a bit.
“In today’s quick tip, new Cgtuts+ author Dimitar Katerov shows us how to alter lighting information by Black & White Adjustment in Photoshop. This allows you to change the appearance of a texture or a 3D render by easily tweaking the light to a particular color range in your image. This is an extremely useful technique when working with bump and specular maps. Let’s take a look!”