Here's something interesting. I used the windows key to switch out of SH4, do some stuff, then went back in. When I went to the bridge, I had sun glare and a glorious bloom from the sunset but it disappeared after about 4-5 seconds and I was left with the blurry orb of a sun that I'm used to otherwise. So it appears bloom and the glare effects are supported but somehow switching off. That's my guess anyway. Here's a before/after picture comparison.
Immediately after switching back to SH4:
A few seconds later:
Before anyone claims it, no this is not due to the sun setting. I was able to replicate this three times in a row by going back to the navigation screen, switching out of SH4, switching back in, and going to the bridge. I was not able to do it just by switching out of and back into SH4 while on the bridge.
I'm really hoping this can help someone on here to debug this problem for I miss the glorious sunrises and sunsets of SH3.
Martin