Hi Hedrus - thanks for the comment. For the images, please refer to:

https://www.kickstarter.com/projects...n/posts/861662

Softer materials with the same shrinkage level would help. Materials with less resolution also help smooth out the surface. The angel is printed with XYZ 0.1 mm resolution using Makerjuice subG+, which is not soft at all. Horizontal lines happens more frequently on models with repeated patterns such as a square or a cylinder. We wish we could give an exact answer about the cause of the horizontal lines, but it could be a result of multiple factors. We will definitely conduct more research in the future about the unpredictable lines. Thanks again!