I'm planning to shoot a bedroom scene that will be filmed during the morning and afternoon. The room has one window and lets in a modest amount of light. How would one create a night time atmosphere and still have decent grain free image using a Canon XR-1. Any setting I should check on the camera to avoid a gainy look. Also are there any gels someone would recommend to cover that window. I was think along the lines of some sort of blue gel. Any suggestions is appericated.

It depends on how stylized you want it to look. Personally, I think unless the window is heavily featured you are best off just blacking it out. Here's a thread (http://www.dvinfo.net/conf/showthread.php?s=&threadid=19646&perpage=15&highlight=black%20tent&pagenumber=1) about this subject.

Anthony

As Charles said, it really depends on the look you’re going for. If light coming through the windows isn’t required, then black it out, close the curtain/blinds and light the room by enhancing the practicals. Use an actor entering a dark room and flicking the light switch as the prompt for you to turn your lights on. Tungsten color balancing can be used as in most indoor shoots.

If you need the moonlight through a window look then it may be easier not to have the real window in shot, but to shoot CTB through a cardboard template of a window frame or a cheep Home Depot type blind on to a back wall.

Using the actual window, IMHO, could be the trickiest, as this depends on how much light is coming through, and what floor you’re on. If it’s a bright sunny day you’ll probably need to defuse the light before it hits the window. Make sure you CTB the entire windows with no overlapping.

Night time as in indoor lights? If your looking for a darkened room you can get some interesting results by white ballancing to incandesent, letting the daylight from outside be your light source and under expose a little.
Chris

Thanks for all you help. I'm going to try some of the things said and will tell you how it turns outs.