[LDCad] Step rotation on Z issue

[mihao]

Hi,

I am trying to create a phone app, and my goal is to show each step of my design (with LDCad) on the phone app the same way as shown in LDCad. I met a problem when implementing the behavior when a step rotating on Z.

Below is a step having no rotation:


But when I just rotate it around Z for 30 degrees, it is rendered like this:


From what I see, it is more like rotating on Y and X for some reason. But if I open the same step in LPub3D, the render is expected as below:



Could anyone help me to understand what is the logic behind this in LDCad? Or can it just be a bug?

Thanks!