Oops...thought I had replied to this already, sorry
Anyhow, this was indeed more or less where I was "driving at"...though the shadows are bluer and lots cleaner they still have a strange hue/tone.
Sometimes I find it easier to use TG's gamma and contrast settings and then render straight to final with barely doing postwork afterwards.
With surfaces and lighting like this I often run into this same kind of challenge of lighting the shadows without getting a strange hue etc.
My suggestion for this now would be to actually lower the GI strength and color on surfaces somewhat and then render at slight higher exposure, or adjust that in post.
Too strong GI on surfaces can cause a strange hue. My first strata wall image is a perfect example of this.
Bedtime now, if needed I will contemplate more about this
Cheers,
Martin
