An FFGL effect that exposes your clip onto a collodion wet plate. The plate only sees blue and ultraviolet, weighted by a published sensitivity curve integrated against a spectrum built from each pixel's RGB, and it's slow, gathering light over a sliding window of seconds, so anything that moved is a ghost as dense as the fraction of the exposure it stayed for. Reds go black and skies go white, motion stacks up into ghosts, a take exposes and then holds the developed plate, and the hand-poured coating drains towards one corner, with a bare pour edge and dust comets. Tintype, ambrotype or glass negative.
This demo runs the plugin's shaders in your browser, so it needs JavaScript and WebGL2. The plugin itself, its source and its downloads are on its repository.