• Sign Language Isn’t Universal
    Articles,  Blog

    Sign Language Isn’t Universal

    For this week’s guest video, you’re probably going to need subtitles. So if they’re not on automatically, you can turn them on in your device settings. And you’ll need them because this week’s guest is Rikki Poynter, a deaf vlogger who makes videos in both English and American Sign Language. She has asked me to apologise for accidentally fingerspelling in front of her face a couple of times here, apparently that can be rude. So, Rikki: [signs in BSL:] Over to you! Hello! As you’ve read from the title, sign language is not universal. For many years now, I’ve seen many comments from people on the Internet thinking that there’s…

  • How Green Screen Worked Before Computers
    Articles,  Blog

    How Green Screen Worked Before Computers

    These days, green screen is easy. You get your lighting right, you point a camera at someone, and then you click a few buttons and tweak a few settings in your graphics software, and there you go. Perfect. But how did they do this sort of compositing before computers? Well, there are two answers to that. One for film, and one for video. And before anyone gets pedantic: I’m summarising here, and skipping over some early efforts and dead ends, but first, let’s talk about film. Actual, bulky reels of film. You’ve got no pixels to deal with there: it’s all chemical processes, all light hitting bits of photosensitive real…