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Exposure Control preview does not respect Gamma settings, making it somewhat useless for a gamma-corrected wokflow as described on pages 3-4 of mr.architectural shaders.pdf.
-Set max to use gamma correction in Customize > Preferences > Gamma (1.8 or 2.2 are common values you can use in testing if gamma correction is not a familiar part of your workflow - I used Gamma 1.8 for this repro)
-Set up a scene where small exposure control changes will be very obvious. I used the following:
----a teapot on a plane with Default Material #8 (Promaterial ceramic)
----and an mr Daylight system set to midnight
----with the outdoor nighttime preset in mr photographic exposure control (EV 3.0)
-Render the exposure control preview and compare to a regular render.
-This will become even more apparent if you up the EV to 4.0 and compare. The preview is pretty much black, while the rendered image is fairly pleasing.
A secondary bug appears to be that the mr physical sky map is not processed by the exposure control regardless of the “process background and Environment maps” option.
WHERE IS THE LINK TO THE THREAD DISCUSSING THIS?
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