I do it for every new application, you may think that you can do the same with a computer but it is not true, in the process of drawing the feeling is very diff

I do it for every new application, you may think that you can do the same with a computer but it is not true, in the process of drawing the feeling is very different, there is no zoom, it's not trivial to erase, so you are forced to think in more pure terms every line you are going to trace.