How to sketch

Because of the particularity of sketch painting, the pencil will have a strong reflection on the light after repeated smearing. So when shooting sketch works, don't use flash, but shoot in uniform light. Moreover, parallel to the camera lens.

Requirements for the camera: the camera should be supported by a tripod, so it is unnecessary to hold it stably. If you are a professional camera, please shoot with short focal length or fixed focus, and don't shoot with wide angle or fisheye glasses, which will cause the picture to have a sense of perspective.