Here's three images I captured today, I would have captured some more and will do in different conditions soon but Forza's sharing system is acting up.
There are a few things to consider here however:
1. My TV is professionally calibrated to have around 98 to 99% colour accuracy amidst other changes. Depending on your display that might vary the image slightly.
2. My TV's brightness has been adjusted.
3. This is captured on a One X (4K HDR). If you're not viewing the image on a HDR screen, that might change things.
Essentially, the image may have changed slightly. You won't see exactly what I see unless you're looking at my TV if that makes sense. A few more things to note:
1. None of the images have been altered in any way in photo-mode or post photo-mode.
2. My in-game Forza HDR setting has been altered (HDR Gamma Maxed, HDR Brightness Maxed, TV Brightness adjusted to compensate, tracking 2.4 Gamma).
3. Every photo taken at 1.0 Zoom level at ground level.
With that aside, here's a few pictures:

(Rain & Lightning Conditions)

(Rain & Lightning Conditions)

(Rain & Lightning to Partly Cloudy Conditions)
I'll try and post some more pictures in different conditions later on such as fog, night, day etc.
Edited by user Saturday, August 17, 2019 5:16:56 PM(UTC)
| Reason: Not specified