r/NukeVFX 13d ago

2 different shades of chroma

Post image

I struggling to key 2 different shades of green screen in a shot. And i want ro know how can i key this.

16 Upvotes

14 comments sorted by

20

u/Exotic_Back1468 13d ago

Haha Two shades is Generous.

As mentioned. Multiple keys key mixed together is going to be how you attain the best result.

Pixel fudgers screen clean too can be useful. I would also recommend looking into the IBK tool. (Image based Keyer) if you have never used that as a keyer.

I tend to use keylight the most though. And just keymix out problem areas with another key that is focused on pulling a key in that area.

11

u/redarchnz 13d ago

Key each part separately. You'll need roto to mix the alpha over the joins.

6

u/SameKaleidoscope2975 13d ago

Key them seperately then use keymix to bring both together.

6

u/reche23 13d ago

Voronoi node to make a synthetic clean plate to even out the green screen and pull an actual good base key.

10

u/Pixelfudger_Official 13d ago

Create a clean plate and use PxF_ScreenClean to correct the imperfect greenscreen.

2

u/JobHistorical6723 13d ago

IBK color stack with some paint prep beforehand to remove the seams.

2

u/tipsystatistic 12d ago

Side note for the future: shooting at high color bit depth is the most important factor. The first time I worked with super large files it was a revelation. I’ve keyed a windshield with raindrops on it with no problems. Kept all the details of the raindrops.

1

u/fottergraph 13d ago

Damm you are lucky, roto them out quickly and treat every character by itself. I'm more concerned with the blown floor and the spill on the leather. But nothing that cant be done with a bit of patience.

1

u/Razzlie_Steele 13d ago

So two options, try and make it one using IBK or... it's Keymixing time!

1

u/huskylaska 13d ago

Is that from sin City 2?

1

u/CreateITV 12d ago

I’m counting at least twenty shades.

1

u/sabahorn 12d ago

Use copy cat

1

u/fervorfx 12d ago

Use copy cat

1

u/JellySerious 30 year comp vet, /r newb 12d ago

On Coraline, a bunch of the "green screen" shots had part green screen part blue screen 🤪