Thanks, everyone, for your comments.
Davdud101:
Thanks for asking, I joined the neck to the body of the bottle by merging faces at the top of the "8" to create a face with six edges, then used the bridge command to attache a six-sided cylinder to form the neck. Same with the base.
ART offers some really cool features, but materials in ART are tricky for me. For instance, I don't know what happened to the environment map on the top of the bottle, though it is clearly present on the bottom. Also, shadows often don't look the way I expect in the ray tracer. Of course scanline renders don't always turn out right the first time either, but since they are so much quicker, It is possible to redo as many times as it takes. It would be cool if there was a way to combine the best features of ART and scanline rendering.
