Ok. What I have is a car. It will be driving through the night. I want it to be able to light up the road. I have considered using the flashlight plug-in but I don't think it would work well enough. So thats why I have considered overlays. Can it be done with overlays? Thanks.
Yes, it should works.
In Duty and Beyond (Mordalles) there's an underwater section in which a submarine light up the scene but I don't know if he uses overlays or not.
He uses a black overlay with the section to be lit up drawn in the transparent colour. This should also be transparent, it makes everything but the section you drew dark.
Thanks jkay, but wouldn't that make the game run rather slow? Mordalles used a smaller background then what I plan to use, so wouldn't that affect performance?