Jump to: Board index » General » Fusion

Strange effects with Primatte and polygon Mask

Learn about 3D compositing, animation, broadcast design and VFX workflows.
  • Author
  • Message
Offline

paolo vidaich

  • Posts: 4
  • Joined: Mon Jun 01, 2015 9:38 am

Strange effects with Primatte and polygon Mask

PostMon Jan 22, 2018 11:25 pm

Hi to all,

I' m not expert about Fusion (and compositing in general) so I'm sorry if my request / doubt is simple (as I imagine).

I have a problem about the combination between Primatte (or Ultrakeyer) tool and a Polygon mask.

In other words, I take a footage with a green screen, and I apply Primatte tool to remove green without problem.
Since I want to remove some objects from the footage, I use also a polygon Mask, but when I connect it to Primatte tool, the green screen reappears again outside the masked area (or inside the area if I flag 'Invert mask').

I attach two screenshots showing an example before and after connecting the mask.

So I wuold like to ask you where is my mistake...How can use a mask on a keyed footage mantaining the transparent background?

Thank you in advance.

Paolo
Attachments
primatte.jpg
Primatte without mask connected
primatte.jpg (277.73 KiB) Viewed 188 times
primatte_mask.jpg
Primatte with mask connected
primatte_mask.jpg (283.13 KiB) Viewed 188 times
Offline

Okke Verbart

  • Posts: 80
  • Joined: Tue Jan 17, 2017 8:40 pm

Re: Strange effects with Primatte and polygon Mask

PostTue Jan 23, 2018 6:47 am

Hi Paolo - you should connect the mask to the garbage mask input instead of the effect mask input. Currently you have got it connected to the effect mask --> this limits the effect (i.e. the green screen) to this mask to this area (rather than acting like a garbage mask and taking it out altogether).

EDIT: and in your case you also inverted the mask, so it only then performs the green screen effect on the image outside of your mask.
www.ablackbirdcalledsue.com

Return to Fusion

Who is online

Users browsing this forum: No registered users and 6 guests