Its Combination of copy and premult node
It may sometime happen that you render your scene with some colored background. With this kind of image there is always an issue with edge while doing pre-multiplication. Through this Gizmo you can easily deal with this kind of problem.
Contact Sheet that Automatically resizes according to number of inputs. Inspired by Ben McEwan's blog post.
Stack merges with an 'over' operation to create better looking thicker smoke.
Auto compositing -Connect a CG element in 'A' input -Connect a BG plate in the 'BG' input Attribute Effects 1- Haze Effect 2- Control Colors (Balance Forgraund) 3- Re-Grain 4- Transform (Forgraund) 5- Motion Blur 6- Merge Control (Balance Background ) 7- ReTime
A simple node that can set all your Merge or Keymix nodes bounding box to (A, B, union, intersection).
his fixes the issue when your background color is anything other then black. Just pick whatever color the guys in 3d or matte painters gave you and Walla! the funky color fringe is now gone. 1.0.2 Added an sRGB knob to do the operation in sRGB instead of linear.
Breakdown_Accordion is a tool that can make some shot's breakdown, max layers are 20.
A handy tool for those who want to isolate or combine multi matte and ID passes channels quickly. Has also been updated with the feature to select the desired merge operation.