Manual Raytracing (MR) is an attractive technology which is inaccurate, laborious, and more time-consuming compared with the real raytracing handled by 3D graphic rendering engines. Hence, to broaden the applications of MR without getting rid of these drawbacks, the current work focuses on drawing a girl playing a guitar without 3D modeling. Three or more illuminants with different colors were set and the interreaction between the illuminants and the guitar was thoroughly calculated by a poor human brain. The results show that the application of MR really takes much of human individual’s time.