i Found the original 1920 x1080 raw screenshot \o/ \o/ that was the shaders i re jigged/balanced a few months ago. another effect i added back then was surface reflection flash due to the heightened speculars. so..... you can see the red balance differences. it was approx 18:30 in that shot which was not representing a realistic light for that time of day in summer. hence the colour balance change. which was the only post processing of any sort. Try it for yourself !