8) Make sphere and center on plane
Select "Create -> Sphere" in the Hierarcy to make a sphere.
Set its position in its transform component to (0, 0.5, 0) so it's just above the ground plane.
9) Run game. (Where's the sphere?)
There are no lights. So everything is black and sphere blends right into ground plane.
10) Make directional light
Select "Create -> Directional Light" in Hierarchy."
Position of directional lights doesn't matter. (It just projects a light in a certain direction onto everything.)
11) Demonstrate in-editor light rotation
We can rotate the Directional Light and see the effects in real time in both the Scene View and Game View.
Set it to a pleasing rotation coming down from above. (I used (30, 60, 0))
12) Turn on soft shadows
Select the light and look for shadow options in the Inspector. Set to high resolution.
Problem- dark side of sphere in indistinguishable from shadow. (A "fill light" will fix this.)
13) Make fill light
Duplicate existing light by right-clicking it in Hierarchy and selecting "Duplicate" (Or select it and press ctrl + D)
GameObjects in the Hierarchy can be renamed by slow double clicking or right-clicking and selecting "Rename." Rename new light to "Fill Light."
Set angle to opposite of main light. (-30, -60, 0), set to a light color, intensity to ~0.1, and turn off shadows.
14) GameObject activation
GameObjects can be (de)activated by (un)checking the box in the upper-left of the Inspector. This does not actually delete the object from the scene- it can be re-activated in code.
Activate and de-activate the fill light to see the changes in real time.
15) Empty Objects
Select "GameObject -> Create Empty" from the top menu bar to make an empty object.
Empty objects can be used for GameObject organization in the Hierarchy.
Empty objects still have a transform that will effect children. Be careful since Unity will set the transform that the scene view is currently looking at when the empty object is created!
16) Organize hierarchy
Make and name appropriate empty objects and organize the current Hierarchy.
Rename "Sphere" to "Player.")