Yesterday, I was filming outside. It was relatively sunny with very few clouds. However, when I shot the scene, I didn't feel the lighting surrounding the character was sufficient.
Will the picture look alright if I use lighting outside even when it's sunny?

when it's sunny you'll need very bright lights to even make a difference unless you're deep in the shade. but yes, people do light outside scenes. the more common method is to use reflectors. you've probably seen photographers giant white umbrella things... movie crews use those, or white or shiny huge boards angled up at the actors and held by crew members out of the shot. this helps a ton.

You can try using a limited amount of reflected light onto the subject(s). That can make quite a difference on film. I have used pieces of cardboard covered with tin foil (the dull side) on one side. Worked alright, and it wasn't too bright. Generally, light from multiple directions works best to somewhat cancel out any unwanted shadows that suggest non-natural lighting.

EDIT: Dangit titaniumdoughnut, I was writing my post while you submitted yours...LOL.

I tried a reflector and it worked amazingly well. Especially the cardboard and tinfoil.

Thanks a lot