Now that I have moved up to ACA08/09 and have even tried rendering, I have some newbie tips to help you to have a go at rendering. But for now you might have run into this 'feature' if you've upgraded.
In ACA09 if you add an aecmaterial to an object, display it in 3D (isometric), turn of layer 0 and regen, you possibly won't be able to snap to much of your objects except a baseline. The workaround is to keep your layer 0 on. It appears to relate to what layer your materials are set to. I advise to leave them on layer 0 but if you put a layer into your mat definition the problems goes away, or at least shifts layers. If you put it on the same layer as the object, the material is applied to then it won't be frozen when you are trying to snap to it. But I don't like the idea of building in layers in your styles as it reduces your flexibilty so I will have to live with it.
BTW this wasn't a problem in ADT6!
Oh and did I tell you that I got ACA10. Received my discs here in Aus before most in the U.S.!
.........It's not fixed in v10.
Is 10 worth the upgrade? I don't know yet. I'm still trying to find everything! I'm very anxious to find out what the new fluid modelling tools can offer to site development. I certainly think it will add to the use of entourage. Imagine a double bed with slightly rumpled bedspread, a dining chair with a cushioned seat, a lounge with cushions and curves. I was hoping to see that you could import a .max file with it's curves but no. Still just .3ds
I'd like to comment on all the fancy modelling but I can't find it :-) I'm sure it's in there unless they removed that for us ACA loosers! er I mean users. Even the 'brilliant' contextual ribbon has nothing to offer. So I loaded the acad.cuix and got the mesh modelling tools!
update "The ‘new fluid modelling tools‘ Ribbon is invisible by default in ACA 2010 . You can show it by right clicking your ribbon tab, and choose "Show Tabs -> Solids" - anon"
But time is gone...... to explore another day.