How to change brightness in certain regions of the video?


    Feb 14 2018 | 12:57 pm
    Hey guys,
    I am creating an astronomy video, and my idea was to get the stars of a certain constellation to blink multiple times, in reaction to live audio input. The video will be the result of an animated still picture, so if I could define certain regions for the brightness to be changed, I think that would do the trick. I am extremely new to Max, so I have no clue how to this. Anybody has ideas/suggestions?
    Thanks!
    Greetings

    • Feb 14 2018 | 5:22 pm
      Hello NC,
      The basic idea for changing a still composition like this is that you would use another image as a mask. The mask has greater brightness in the areas that you want. You're adding to the values contained in the pixels to make them brighter. There are lots of ways to accomplish it, and I'd recommend working in GL such as with jit.gl.pix or jit.gen to keep your frame rate as high as possible. Here's a gen example. Also, Jitter tutorial 9 covers this.