Devlog #5: Exposure Modifications

I finally finished my exposure modifier. The big change from before is that i changed it from three buttons (average, lighten, darken) to a slider, so now the user can pick the right amount for each photo. 

Exposure Modifier

The slider has lighten and darken on each end. The lighten side keeps the brightest pixel across all your frames at each point in the image. This is supposed to improve the appearance of light trails in dark long exposures. Darken does the opposite. It keeps the darkest pixel, which is kinda niche and really only works to a small scale.This was built with a metal compute shader to track a running min, max and average across all the frames at once in linear light. The slider just picks how much to mix in the min or max, so moving it doesn’t require re-blending anything.

To do: i still want to add some sort of motion blur to smooth in the diff between frames a little bit