Creating a Specular Map with existing bump map

To get the correct light point on the face a specular map had to be added. Using the existing bump map the image levels were adjusted until the background was black, but making sure the whites were visible.

In a new layer the brush tool was used and set to lighten with the opacity to 20%. The lighter parts could then be drawn onto the face. The Gaussian blur feature was used to soften the edges of the brush and make it more subtle. The file was then saved as Specular Map.

In 3ds Max a specular map was added to the skin material and the specular map file was loaded as a bitmap. The image was then rendered and adjustments were made to the Photoshop file to get the desired amount of shine on the face. The level amount was set to to 50, which gave a subtle shine across the face.