'Basic-2 Opacity' from the default Krita brushes is a brush preset ideal to do a speed calibration of your pressure On my last brushkit ( version 3 ) the preset 'Basic Rounded' as on the picture bellow is ideal for this, and already setup to do the calibration : The process takes less than 2 minutes, and can be done when you feel pressure do not respond as you are used to.įirst, you need to open a white canvas and select black color and a brush with a linear curve on the pressure. Or, the inverse, if you feel every brush presets are too sensitive and do too much effect for you, you probably have a calibration problem. If you scratch often the surface of your tablet, it's probably because too much pressure. If you have pain in hand after painting for an hour, it's probably because you need to put too much pressure to get the effect you want with a hand used to low pressure. Calibrating will help you to express light strokes, and full strokes without putting to much effort in your hands. So you understood it you need to make the computer understand what is for you a light stroke, the mid one, and a full pressure as well as all the in-between. Some day you will feel 'soft' and will have hand only expressing low levels of pressure and some days you'll feel like a warrior and put a lot of pressure on the stylus. Stress, health, energy and excitement can affect your way to express the pressure, and change daily your muscular approach of the stylus, so your "pressure" skill. When you open your computer at morning, take your stylus and start a first stroke, do you know exactly where is your mid-pressure ? Probably not, because this feeling change. It isn't hard nowadays to fill this specification requirement. So, as a rule of thumb when I buy a tablet : pressure level must superior or equal 512. I had issue testing line-art with 256 level of pressure on really old tablets 256 is not enough and affect transition if pressure is mapped to the line width. This was performed on a Intuos4 Medium with 2048 level of pressure, and I can do the same with a Bamboo fun with 512, and a Cintiq21Ux with 1024 level of pressure. Most artist I see on videos have only 3 : the light stroke, the middle one, the full one. It does sound low, but it's already a lot. I guess I can only manage up to 6 or 8 level of pressures decided with my hand. I have here tablets with 512, 1024, 2048 and the reality is with any of this levels you'll can't perform more variation than this :ġ3 level of opacity done with the same brush preset ! and to be fair, most of my stroke are similar. Ok, I stop useless rant here, because getting more 'level of pressure' can't hurt and even can be a good thing, it's not really something important, in my opinion. ( I bet soon we will have to count this in MP or GP, MegaPressure or GigaPressure ). and Wacom also did it starting with 512 then 1024 then 2048 level of pressure. Easy :-) How many pressure level needed ?Ī common marketing bullshit strategy is to sell with upgrading any specifications numbers. Our software, here 'Krita' digest those values and according to the brush preset selected and settings interpret a stroke on the canvas. So, the little spring linked to a sensor inside our stylus 'hear' how much pressure is done, and return a value. With a Wacom stylus it's different : we are not going to crease the surface of our tablet, or lay down any ink. The resulting stroke is thinner and even often light-grey.Ī ballpen 'made in France' and real life pressure example However, when the pressure is low, the ball have difficulties to roll or getting contact to the surface of the paper, making 'ghost' holes in the stroke, and revealing the texture of the paper. So, when receiving high pressure, the ball tip of the ball-pen crease the paper and flatten it, making easier the ink deposit process and creating larger and darker lines. Pressure also exist in traditional media, this ball-pen ( photo under ) have variations of stroke size and opacity depending the pressure. This value helps software as Krita, Gimp or Mypaint to give extra feeling to the traditional tools. In a nut-shell : the more you press on the tip, the more high value will be transmitted to your computer. The pressure value - in digital painting - is driven by a sensor inside your stylus in contact to your stylus tip. Ignoring this, make them struggle when changing of tablet hardware, have not consistent glazing ability and poor digital freehand line qualities. I often see a lot of digital-painters ignoring this step. Indeed, I often start my talks with a brief "how-to calibrating correctly the pressure" session. If you were my student, or attended one of my workshops or conferences this tutorial will probably sound familiar to you. Update: Spanish version available on Chalo Blogg.
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