LUT VFB preview + curves

[JakubCech]

Hey guys,
I am using quite much LUTs in my workflow and these are many times reason why I switch back to the vray. I think it is important feature to have as well as curves - not everybody uses the same contrast pivot and tries to achieve result directly in VFB. These are my most wanted features. Keep up great work.

[Ondra]

https://forum.corona-renderer.com/index.php?topic=3584.msg26003#msg26003