How to solve the problem of model aliasing？

Question1: I use OCC's visualization module to display the model. However, I found that the edges of some simple models were seriously aliased when they were being visualized. Is there any way to reduce the impact of aliasing in OCC Visualization without modifying the model file? For example, when I get the normal vector of the model in OSG, I could use osg:: smooth() to anti-alias.
Question2: Personally I learn Opencascade on a forum in my country. But sadly there isn't much information about OCC. So I learn OCC slowly and inefficiently TAT.Would anyone mind giving me some suggestions on learning OCC more effiently? For example maybe some books or websites......
Thanks in advance!
The attached is the severely jagged picture.