Are you missing the picture.
Silver or grey projector screen white ceailing light grey walls.
After moving my projector from the basement to an upstairs room i was really surprised how much light reflecting off walls lowered the picture quality on a white screen.
A grey screen such as the elite cinegrey 3d screen shown here can help boost contrast and perceived black level when there are concerns with room light a reflective white ceiling or walls or a projector s inherent contrast.
A grey screen will help combat this.
But it comes at the expense of some image brightness.
Reputable projector companies calibrate their projectors to a white screen right out of the factory.
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Looks like there is a lot of projector light bouncing off your walls and ceiling.
In so doing the black level on the screen is maintained.
The image on a white colored projector screen will have great color reproduction and vibrance but will not display blacks very well.
The other style is a light gray color and is a newer innovation in projector technology first appearing only in the early 2000s.
I would not use the silver screen because you will get hot spotting.
In my experience a slightly positive gain white screen is ideal for 95 of installations and people start looking at grey screens as some magic fix when all it does is suck up light and perhaps help with a projector which has poor black levels in a room painted way to light.
The gray screen absorbs ambient light that strikes it better than a white screen does.
This works because assuming the projector has ample lumen output as most digital projectors do whites remain satisfyingly white while blacks are maintained at a deeper black.
They are often called high contrast screens because they can help to improve the depth of blacks while still allowing bright and colorful parts of the image to shine.
On the other hand a gray projector screen will display blacks very well and have a better contrast ratio but the colors and vibrance of the image will be on the lesser side.
Most of the time a white material will be perfect for your room and theater system.