https://www.allegorithmic.com/products/bitmap2material  

 http://lynda.com/tutorial/573606  

Bitmap2Material is an incredibly powerful tool that helps you generate full, seamlessly tiling materials from any bitmap image, right within your favorite DCC tool and game engine*. This now includes all PBR (Physically-Based Rendering) channels, based on the most accurate conversion algorithm out there.

HIGH QUALITY OUTPUTS
Bitmap2Material lets you extract all the possible maps from a single image: this now includes PBR channels such base color (or albedo), metallic, roughness but also normal, height, specular, curvature, AO etc.

ADJUST HIGHLIGHTS AND SHADOWS
This allows you to create the base color (or albedo) for PBR and can be done in just a few clicks.

REMOVE SEAMS
Bitmap2Material provides the ability to make any material tile. You do not need to care anymore about making your photography tile, B2M takes care of it for you. You can chose between 2 modes of tiling: offset or splat.

GENERATE THE METALLIC MAP
Easily obtain a metallic map from the image using simple tools, or an input mask. This feature is essential when working in PBR.

FULL CONTROL OVER MICROSURFACE
Control and adjust the finest details of your material thanks to the comprehensive set of parameters exposed by B2M. This includes adjusting the generated roughness map, for PBR.

SHAPE RECOGNITION
Bitmap2Material is the only map extractor which can keep the original shapes of your picture among all your maps.

GRUNGE MAPS
Change the look&feel of your material with one of the 15 embedded grunge maps, or use one of your own.

AN INFINITY OF VARIATIONS
B2M offers the unique ability to randomize your material and produce infinite variations with a single click!

Topics include:

Bitmap2Material UI
Exploring the parameters area
Bitmap2Material Lite
Loading Bitmap2Material
Adjusting output size
Changing the colors in an input bitmap
Using the low, mid, and high frequency controls
Setting the Roughness Value
Setting the AO balance
Loading your maps into Unreal Engine