How to Fix Ratty Line Rendering in WMS?

[Bill Thoen]

First, a thank you to Gregor Mosheh for his response to my earlier 
question about producing scale-dependent layers from a WMS server. The 
'GROUP' method works well!

But now my problem is that linework from my WMS looks pretty ratty 
compared to using the same data in vector form. Is there any fix for 
this? How can I produce smooth road lines?

- Bill Thoen