Examples of hotspot on a Benq W2000 (HT3050) and a 106" Cinegrey 3D, white walls.
The first 6 attached pictures with throw range x1.15 (minimum), table mounted, Full lamp, 1h on lamp, Cinema, Brilliant Color off. The hotspot in the Passengers and other examples looks better in real life than the pictures, but don't know if it's acceptable.
The last 3 are with the longest throw range, x1.5. 1h on lamp, Cinema, ceiling mounted. From left to right: Full (with BC), Full, ECO. It's not that obvious from the pictures, but the hotspot is impacted by the brightness of the projector.
Hotpot clearly seen in the 9th picture in the link below. x1.5 throw range, SmartEco (similar to Full with the white background), BC off, ~1000h on lamp:
Brilliant color adds 27% more brightness.
The difference in brightness between full zoom and min zoom (or longest and shortest throw range) is also 27%. The closer the projector is the brighter it will be. The brighter it is the more pronounced the hotspot.
With ALR's the the angle at which the light hits the screen matters because it is reflected back at the same angle. Which is why short or ultra short projectors cannot be used with this type of fabric, and generally the minimum recommended throw range is x1.5.