Part One: Material Exploration
For this portion of the project, the I developed three procedural materials in Designer and applied them to a sphere and cube in Unreal. These three materials were later applied to models in the picnic scene, with an old version as well.
Because the focus of this part was manufactured materials, in some cases emission is used to fake the look of subsurface scattering.
Part Two: Manufactured Materials
For this next part of the project, I developed the remainder of my manufactured materials for the scene in Designer and then applied them in Painter. I then created an old version for each material in Painter. Maps were then brought into Unreal to set up the shaders. Wherever a map was not needed, I used a constant node switched to a parameter for efficient use in a material instance. I also utilized multiply and add nodes with constant parameters to edit maps in Unreal.
Because the focus of this part was also manufactured materials, in some cases emission is used to fake the look of subsurface scattering.
Part Three: Organic Materials
In this section I developed the organic materials for the scene. Subsurface scattering played a huge role in these materials. Once I had learned the method, I also went back to several previous materials from parts one and two that were using emission and switched them to subsurface. In some cases such as the background grass and lemonade, emission is still used to aid the look I was going for.
Depending on the material I used one of three methods in Unreal: Two-Sided Foliage, Subsurface Profile, or Subsurface. I used base color maps with a multiply node and constant parameter as the input for Subsurface Color.