Compensate for exposure after sampling background color, adjust transmission example #1
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This PR fixes the underexposed transmitted images.
Turns out since exposure is now applied to transmitted light (like all other light types), and the transmitted light was being sampled from an already exposure adjusted background image, we were effectively applying exposure twice. We now compensate for that.
This PR also tweaks the example to look good under the new default exposure settings, and removes the
ColorGradingexposure adjustment, now thatEnviromentMapLights can have their intensity adjusted. (It was a workaround for an overly bright enviroment map)