Game Development and Simulation with Unreal Technology

Materials in Unreal Engine 225

To achieve more depth, we also adjusted the normal map a little. If you re-

member from o ur d iscussion of normal maps from a previous tutorial, e ach pixel

in the normal map repr esents a three-dimensional vector, perpendicular to the

surface at the location of the pixel. The R, G, and B, values of the normal map

pixels represent the X, Y, and Z values o f the normal vector.

The Z-value represents the len gth of the vector perpendicular to the surface,

if the surface were a flat plane. The larger the Z-value is in comparison to the

X and Y values, the mor e flat the surface will look like. In or der to m agnify the

3D look of our material we can multiply each channel of the norm al map with a

value. If the Red and Green ...