I have devised a theoretical technique to do autoexposure pinhole flash photography on my OM-4Ti. The camera will quench a TTL-compatible flash when the correct amount of light reaches the film, using the off-the-film metering sensor. (Modern digital cameras can't use sensor reflectivity for this, because it isn't an appropriate surface, so they use a preflash, which is in my arbitrary opinion an inferior and inflexible technique.)
The camera will ensure correct flash exposure even when there is no lens on the camera.
If I use a series of Olympus TTL Multi Connectors and the appropriate cables and compatible first or third party flashes, push my film to 1600 or 3200, and wire the camera to 2-4 handle-type professional flashes or five to eight smaller flashes, and a 300-micron pinhole installed in a body cap, the entire arrangement will be able to provide and control enough light to work at photographically useful distances, indoors and outdoors. Depending on shutter speed I might be able to use a high-power flashbulb as a booster; as long as I stay far enough away that the flashbulb alone would underexpose it, the camera will handle the rest with fewer electronic flashes needed. I might need to build some sort of buffer amplifier to ensure the camera can drive the quench pin of each flash reliably.
As far as I know, nobody has done anything like this, because it's contrived and stupid. That means I'd be the first.