PRE-VISUALIZATION FOR FILM WITH JASON MICHAEL HALL polish
Previz is basically problem solving. It helps to have a spot light to focus on one specific area, so you can adjust the hardness of the shadows while the directional light makes the whole scene lit, you can have both but for zoomed in scenes sport lights are better, even if dim. To save lots of time in animating, making a separate file of run and walk cycles that you can import to rigs will be really helpful. At the same time if the character is holding something and the walk cycle has the arms flapping about then you'll have to delete the arms animations, but a 20 frame by frame on the scene you're working on is good if you don't want to import and delete constantly.