About red shadow in a place you don't want it to be... I don't know how's that in your software, but I have Exlude option... And then I Exlude objects that I don't want to have red showds. That option should be somewhere in light opitons. You have to look for it...
When rendering turn of anti-alising and render to normal bmp. You'll change bmp format later, after creating Storyboard