It Took Me 30 Years to Solve This VFX Problem – Green Screen Problem [video]
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Re: It Took Me 30 Years to Solve This VFX Problem – Green Screen Problem [video]
#2Watched this a few days ago. The video is light on technical details, except maybe that they used CGI to generate training data.
Re: It Took Me 30 Years to Solve This VFX Problem – Green Screen Problem [video]
#3In an earlier video they made a couple years back about Disney's sodium vapor technique Paul Debevec suggested he was considering creating a dataset using a similar premise: filming enough perfectly masked references to be able to train models to achieve better keying. So it was interesting seeing Corridor tackle this by instead using synthetic data.
Re: It Took Me 30 Years to Solve This VFX Problem – Green Screen Problem [video]
#4The community has managed to drastically lower hardware requirements, but so far I think only Nvidia cards are supported, so as an AMD owner I'm still missing out :(
Re: It Took Me 30 Years to Solve This VFX Problem – Green Screen Problem [video]
#5Looking forward to trying it out, 8gb of vram or unified memory required!
Re: It Took Me 30 Years to Solve This VFX Problem – Green Screen Problem [video]
#6Pretty impressive results! Seems like someone has even made a GUI for it: https://github.com/edenaion/EZ-CorridorKey
Still Python unfortunately.
Re: It Took Me 30 Years to Solve This VFX Problem – Green Screen Problem [video]
#7From ~04:10 till 05:00 they talk about sodium-vapor lights and how Disney has the exclusive rights to use it. From what I read the knowledge on how to make them is a trade secret, so it's not patented. Seems weird that it would be hard to recreate something from the 1950's.
I also wonder how many hours were wasted by people who had to use inferior technology because Disney kept it secret. Cutting out animals and objects from the background 1 frame at a time seems so mindnumbingly boring.
Re: It Took Me 30 Years to Solve This VFX Problem – Green Screen Problem [video]
#8See also this video comparing Corridor Key to traditional keyers:
Re: It Took Me 30 Years to Solve This VFX Problem – Green Screen Problem [video]
#9I'm a software engineer that, like the vast majority of you, uses AI/agents in my workflow every day. That being said, I have to admit that it feels a little weird to hear someone who does not write code say that they built something, without even mentioning that they had an agent build it (unless I missed that).
Re: It Took Me 30 Years to Solve This VFX Problem – Green Screen Problem [video]
#10In an earlier video they made a couple years back about Disney's sodium vapor technique Paul Debevec suggested he was considering creating a dataset using a similar premise: filming enough perfectly masked references to be able to train models to achieve better keying. So it was interesting seeing Corridor tackle this by instead using synthetic data.
With regards to the sodium vapor process, an idea has been percolating in the back of my head ever since I saw that video. But I don't really have the budget to try it out.
theory: make the mask out of non-visable light
illuminate the backing screen in near Infra-Red light. (after a bit of thought I chose near-IR as opposed to near-UV for hopefully obvious reasons)
point two cameras at a splitting prism with a near IR pass filter(I have confirmed that such thing exists and is commercially available)
Leave the 90 degree(unaltered path) camera untouched, this is the visible camera.
Remove the IR filter from the 180 degree(filter path) camera, this is the mask camera.
Now you get a perfect non-color shifting mask(in theory), The splitting prism would hurt light intake. It might be worth it to try putting the cameras really close together , pointed same direction, no prism, and see if that is close enough.