In the shade - as in, overcast day, no direct sunlight but as much diffuse light as you can get to eliminate shadows. Applies to indoors too where you can have absolute control over the light.
full picture - as in, make your object of interest cover as much of the pictures you take as you can. Try for 80% or more.
If you can only cover part of the object because of that, you need adequate overlap when you photograph the other parts so RC can piece the object together.
That is how I understand and apply it.