Looks pretty sharp. I have the same screen (material and size). Love it!
Are you planning to paint that white ceiling? I highly recommend you do... the spandex has a screen gain of about 0.8 so you need a bit of a light cannon to project quality HDR. 140” isn’t massive, but it’s still a pretty big screen for a projected image. Long and short, you are going to want to minimize the light reflections onto your screen. The drop ceiling would be my first concern.
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