3 monochrome shots, one filtered red, one filtered yellow, one unfiltered
edited in rawtherapee then loaded into gnu imp. subtracted red shot from yellow shot to produce a psuedo green image, then subtracted the red and pseudo green from the unfiltered to produce a psuedo blue image, then composed the three as RGB. phone photo of the scene is attached. I moved my camera slightly and fucked up the focus when unscrewing a filter so it ain't perfect but it is surprising how "accurate" the colors came out.

or polarized deltachrome? whatever we can just say words. saw ppl in #cool-pictures talk about the technique so here's my go at it. 3 shots with a circular polarizer at different rotations then composed as RGB. not the most interesting subject, but those cars sure can shiny! (i cant find my tripod so front porch shot will do for now)

somehow in b&w only one stripe shows on our trans flag and i dont think it's the middle one :O

not much movement in the scene, turned out less interesting than i hoped when i took the pics

art day

similar to the last one but 3 completely separate images composed as HSV layers. looooots of different ways to compose.

take 3 images, edit in darktable as monochrome, export all to tifs, gnu imp import all 3 as layers, color > compose using the layers as RGB, badaboom. an image where everything still is monochrome and motion shows up as color.
i took the 3 images using the pentax q's interval shooting mode at 1 second intervals so it would be perfectly still between shots. unfortunately it can only clear the buffer fast enough to take 4 images at that speed before giving up > . >
god i wish i wasnt so hardware limited.
on a nicer camera one could do a burst shot and get some very neat motion across the frames. you could go up to 6 frames if you color the extra 3 as CMY, could do 9 if you let every third be pure luminance. lots to work with depending on the kind of motion you want to capture and how busy you want it to be