Unreal Units are Flexible. "In all of the Unreal Tournament games, 1 Unreal Unit is equal to 2 cm. In Gears of War approximately 2 Unreal Units equal 1 inch, because the characters are 156 units tall and a floor of a building is 256 units tall. This was decided on for grid purposes and so our cover height worked out well.…
Like this: You probably need to watch some tutorials for introduction to unreal material graph to get familiar with the basics. Ben Cloward is a good youtube channel for that.