I searched a lot of hand-painted materials on the Internet, but as for how to draw them. You can refer to other people's PS design instructions to show color pages, how to touch them, and then you can draw them by hand, just like turning pictures into hand-drawn drafts. Just like sketching from a picture, for example, the landscape road analysis plan of a residential area: after drawing elements such as square, greening, architecture and waterscape by hand. The line shape of the road is also drawn, and the road classification and the road path between road houses at the community-level road group level can be drawn directly with Mark's pen. The lower the road grade from left to right, the lower the road width and the narrower the strokes. Colors should also be distinguished. Red, yellow and blue are commonly used. I hope I can help you.