I don't know if this is specific to Krita, I'd just like to understand how to handle it, as I cannot find any specific posts or info addressing it. [Please note that I am a beginner and I am not doing this professionally].
If anyone could please advise, it would be greatly appreciated.
If you're working with 'physical' painting/drawing tools, you know the size of your canvas or sheet, and the size of your brush tips, pens, etc., like '2 in brush', '1/2 in brush', etc. (see Bob Ross' 'The Joy of Painting' videos, for instance).
That tells you immediately what size, relative to your canvas, your brush stroke will have when you apply it.
If your canvas is 10 in wide, and you use a 2 in brush, you know your brush stroke will occupy about 1/5 of your canvas' width.
In Krita, when I create a new file, I set the canvas size in cm (e.g. 5 x 5), and I need to set the resolution (e.g. 300, 600 ppi).
Given that brush sizes are expressed in pixels, not inches or cm, this implies that the same brush, set to the same pixel size, on a canvas of the same size , will appear exactly twice as large if the ppi setting is halved.
I understand the technical reasons for it, but I do not know how to handle it, for consistency.
Of course I can resize the brush tip according to the resolution, so that the size of the brush stroke is the same, but as you know that completely changes its appearance, because (at least for the brushes I am using) the brush tip is an image of fixed size.
I pasted two examples below.
I made a screenshot after resizing both canvases to 'fit height', to show the alteration in the definition.
The 50 pixels brush stroke takes exactly twice the relative width of the canvas in the 300 ppi one compared to the 600 ppi one.
Resizing the brush to 25 pixels in the 300 ppi canvas does make it scale to the relative size it has on the 600 ppi one, but you can clearly see the loss in definition and detail.
One obvious solution would be to stick to the same resolution in all files.
Is that what you would advise to do? Any other ideas?