Best Lighting for ChromaCam Auto

I just installed ManyCam last week, specifically to use the Virtual Background features (Blur, ChromaCam). I do not have a green screen. There are different times during the day when I see that it works better than others, specifically the foreground detection. I think it must be the lighting because I’m near a window and it changes throughout the day. Are there any suggestions for lighting that help Many Cam determine the foreground area? Or any other tips to make sure that the foreground is picked up properly?