Gas Mask

You need a gas mask with filters to breathe contaminated air, which is always but not exclusively found above-ground. The presence of a gas mask on your face can be determined by looking for water droplets at the edge of your vision. It shouldn't be hard to tell when you need the mask, because you'll hear choked breathing and your vision will begin to blur and bob.Filters last 3-5 minutes depending on difficulty settings. Will need to time different variations of difficulty later.Your filters are tracked by breathable time remaining, not by number of filters. You may have Artyom screw on a new filter as often as you wish and it will use only as much filter time as needed to fill your gas mask back to maximum capacity. Contrary to rumor, filters do not last longer if you replace them while standing near a fire.If you're playing on Spartan mode, the watch will display filter time as a number. If you're playing on Survival mode, time is tracked by the red and green lines. The green lines track up to five minutes (as indicated by the rightmost green line), but it's broken up into four intervals, meaning the distance between each green line actually represents 1 minute 15 seconds.Filter time will not be consumed unless you're standing in unbreathable air. You should still take your gas mask off when it's not needed because damage will eventually break the faceplate, making the mask useless. Damaged gas masks can be replaced by finding another mask in the environment, but you can only take it if your mask is more damaged than the one you're looking at.Your filter time can drain faster if you're standing in radiation. If you're standing in radiation, you're probably also taking health damage, so don't stand in radiation longer than you actually need to. Filter time will not drain faster based on whether or not you perform activities that would actually make you breathe faster e.g. sprinting.Not having a gas mask on does not cause gradual damage. It starts a ~35 second timer that will kill you instantly unless you put a gas mask on before it runs out. Thus, if you're desperately low on filter time, you can actually leave your gas mask off and only briefly put it back on for a single breath of good air before taking it off again. This will save a lot of filter time, but it's also really tedious and immersion-breaking, so don't get reliant on it. You won't be too short on filter time if you don't skip supply caches in the environment and don't take too long getting from place to place.TODO: EXPAND ON FILTER MECHANICS AND USING THE WATCH TO READ REMAINING FILTER TIME, LIMIT TO BUYABLE FILTER TIME AND COST INCREASES, MASK DAMAGE VS FILTER TIME, HOW MUCH FILTER TIME THE MASK ACTUALLY HOLDS (3 OR 5 MINUTES)