I'm not posting this to the bugs section because it probably is a problem on my part.
All of a sudden, when previewing a project in NW.js, it applies a reddish tint effect. Firefox/Edge/Chrome work perfectly. It's only NW.js that does this and only in preview. When I export a NW.js project all is normal. See pic bellow. Top is Firefox, bottom NW.js.
I tried uninstalling/reinstalling both R216 and NW.js v0.12.0.
Has anyone encountered such a thing?