I have almost completely switched from PP2015 to R12. The 1 effect I can't figure out is alpha bevel. I use this to simulate a fairly convincing back/shoulder light on interviews. It is like a transparent, soft white drop shadow but cast within the matte created by the green screen rather than outside like a real drop shadow. Any Resolve experts out there with suggestions. I think it would involve making a 3rd mask by intersect the alpha with an inverted alpha and offsetting slightly to create a rim mask on the north boundary of the individual's silhouette.