So I used to shoot in a room with no natural light, & now I use my living room which has a large sliding door (with curtain). I just use an AB 800 with a large octabox and I notice since I switched rooms my white balance is a little funny & I have weird lighting on some photos. I thought that my strobe would overpower the natural light and not make a difference? I've read SS can affect ambient light. Help a newb out - should I throw a blackout curtain over the window or what?