The surface quality in 3D printing varies greatly as there are many factors to affect it such as layer thickness, print speed, part orientation and ect. This article discusses how to improve surface quality in 3D printing by optimizing part orientation. We put the same model in different positions in ChiTubox which form a certain angle with the vertical plane as 0 degree, 30 degrees, 45 degrees and 90 degrees. Except 90 degrees, the models are positioned in a square and rhombus at each degree angle because those two shape have different cross-sections during the 3D printing process. Download ChiTuBox: https://www.chitubox.com/download.html So we get 7 models in total, numbered 1-7 (0°Square Orientation, 0°rhombus Orientation, 30°Square Orientation, 30°rhombus Orientation, 45°Square Orientation, 45°rhombus Orientation, 90°Orientation). In general, the angle is preferentially 45 degrees. But it still needs to be tested. In the following content, we’ll evaluate the...