It looks much better at handling highlights, plus the "tm" parameter is great.
Noticed some differences with v1.4 again, at this point I compare against madVR but it's getting harder to tell which is supposed to be "correct"
Screenshots in order: v1.4 light=250, v1.5 light=250 tm=0.90, madVR 250 nits
The hue shift seems to be fixed in this sample so that's good. Looking at the red lamps at the top, 1.4 is definitely shifted to the right and looks wider.
The middle of the lights isn't red but it's hard to tell if it's supposed to be, at least from the untonemapped source.
There's a spot of light orange in the sky instead of white, which looks like saturation applied there. There's definitely some banding there in the source itself so that might be the cause?
Otherwise some colors are different, like the blue wavy line at the front of the boat is a bit darker. Not sure if it's a lack of saturation or too much saturation though.
The orange and red stripes in the flag are less saturated as well.
Sample URL: https://mega.nz/#!gZF2FS6a!V4e1acBSNx74 ... tfMlZdTkBc
I'll test other samples where I saw issues before and report back.
So after some other samples, there's definitely a desaturation of red/orange happening, compared to v1.4 and madVR.
I'm not sure about other colors yet
From another sample, which reveals the same white spot in deep red lights, as well as desaturation and some fine detail smoothing on the left side (our left) of the face that's probably caused by lower gamma/contrast.
Screenshot is from frame 129.
v1.4 has the colors proper, but hue shift all over the place.
In order: v1.4 light=150 peak=2.0, light=150 tm=0.90, madVR 130 nits
Sample #2: https://mega.nz/#!5A8FHJJI!t9NhrAw64prb ... pCKsq0QESU
If you compare with madVR at the edge of red light on the face (especially on the nose), you can see the clipping of color whereas madVR has a roll off to lower saturation.
That might be the same issue as in the bright spots on the metal.