[Why the shell part which i built in Rhino don't show up in Cura?]

just the solid part remarked by green circle shows up, the other shell part denoted by red rectangle don't show up.

Besides this, the solid part which i built in Rhino just become hollow.

[Create infill patterns with a certain angle]

1 hour ago, gr5 said:

I think "cubic" does that?  Not sure.  Try every single infill type.  Did you see where to change the infill pattern yet?

 

Another trick is to tilt your model on the build plate.  but you may need more support than normal if you do that and the bottom surface may be ugly.  Maybe you don't care.

Thank you, yes, Cubic is ok.

[Create infill patterns with a certain angle]

I am new for using Ultimaker, and i  don't know how to create the 2D infill patterns which have a certain angle with the level? i hope somebody with relative experiments to give me some suggestion, thank you in advance!