VSCO FILM 03: What are the various warm, cold, HC and alt presets for in VSCO Film 03?

Unlike any other type of film, instant film puts the entire development process in the hands of the user. The packaging of these films all have pretty strict instructions about development temperatures and times, and it turns out that those variables can make a big difference! Instant film is often known for being very unpredictable, and temperature variations in development are largely responsible for this reputation. So, we tested these films at all sorts of temperatures, both in and out of the manufacturer's recommended ranges, and we started to notice some patterns with warm and cold development temperatures. This is where the warm and cold presets come from… mostly.
Another component of development that instant film puts into the hands of the user is scanning and color correcting. Particularly with the black and whites we were faced with some choices at this stage because even with perfectly profiled scans, there was usually still some degree of a color tint to the photos. For the most part, we tried to match what the actual film looks like as you hold it in your hand and look at it, but some of the variations and tone toolkit items are also based on these scanning tints. Additionally, personal preferences with levels can make big differences. (Is the black/white point the absolute darkest/brightest pixel, or is it more relative based on what looks good in the photo?) The HC versions stand for "High Contrast" and they typically represent a more aggressive correction.
With the 03 Professional films, the amount of time that passes before the positive is pulled from the negative can have a big effect on the final look of the image. Several of the + and ++ versions explore these looks, and also the "Early Pull" version of FP-3000b Negative.
Lastly, a few films gave us some really interesting and useful looks that didn't really quite fit into our usual + / - mold with the others, so the Alt versions were added in these cases.