Resolume Video Training
2.8 Positive & Negative Space
This video shows how you can keep your output under control and how you can use positioning and effects to give your composition room to breath.
VJ'ing is more than throwing some clips on top each other. A good VJ thinks about where to place content and how to blend it into the overall composition.
This way, you can completely change the impact of your output and keep your composition balanced.