How to set the region inclined of specific degrees

Dear All,

I want to set the initial material bed region inclined of specific degrees, I do not want to rotate the imported model, how can I do that? Thank you.

Best regards,

You can possibly do this by making an .stl, or perhaps by building (and rotating) a slightly oversized Procedural geometry - though I haven’t tried the latter myself.

Thank you, I worry that due to the geometry structure, if I incline it in cad software, the inlet and outlet tubes would be elongated to unrealistic extent. The inlet outlet, material bed and inclination angle are shown as follows.