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Ah , not many know it … There are two types of drawings when it comes to digital . Raster and vector . A raster is all ur photos and resolution . It’s basically painting pixels of a computer ,high hi the quality more pixels ,less quality less pixels . So if u zoom in u will see the pixels blending … In theory u can paint a picture as it is by painting each pixel but it’s extremely difficult .

But the size increases as you paint . If u scale the image u have drawn it will pixelate and will not be exactly as u had drawn so u have to decide the size first then draw .

In vector it’s different . You don’t paint pixels ,it’s a set of mathematical problems …. Think computer screen as a graph sheet ,if u draw a line there is a math equation like x+y or something (Iam weak in math so I don’t know the formula ) so it’s basically written and not drawn like in raster . So If u scale the diagram up or down , nothing will break , everything will remain the same because for no matter how much scale the math equation for a line remains the same . Then u may ask why vector is not used for photos . Well there is one problem with vector . It will not blend. U can see the  difference between colors which will not be present in raster ,cause u paint every pixel in raster which is not possible in vector so u won’t get the blend  or the realistic feel .

So Photoshop , krita etc… Uses raster

While animate , after effects , toonboom etc…. Uses vector . The only reason why animation software uses vector is cause u animate thing and you can animate without pixel breaking up ..

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Yeah these things are technical and not needed for an artist , but when it comes to picking a software … U need it . Since I study the technical side of it too ik how software works like  I can draw using just lines of java codes …. Yeah that’s what actually happens when u draw …