Scenic Artist? Scenic Painter? T.D?

(sorry for the worse spelling grammer etc than normal its 3am) So here at Cal arts i am confused student. No doubt about it. I am a Bfa scenic painter,  a course which they don't have. So I study set design. Set design dose not have much production work for a BFA 2, so after a few months i approached the TD department and i have been working non stop ever since. Although helping build a lot of the set i feel i have done a lot of Scenic work also, Work that here is left to the TD department. The Scenic Artist seem more of Scenic Painters for example.. we made these walls

At home i suspect the Scenic artist would apply the Bottles but here it is the T.Ds. The Scenic Painters added a layers a drippy layer white paint to the the bottles. Which will look amazing in the light. I was part of this the paint call.

Once we finished the walls  (over 7000 bottles) .   We made curved benches. This involved using a Jig and a revived maths skills as the benches had to be cut a specific circumferences.

We also made a raised rake circular platform.

Above the platform we made a " technology tree" This was great as we bent pipes on the pipe bender which involved a trip to the SUPER SHOP. Its like the Scene shop but for artists so the tools are amazing. I didn't get to weld however as the class isn't running this year but i am going to learn a little after the production is over!

Then after treating the benches with paper and metal lathe we began to cement them. Now dont get on at me if i'm wrong here but why are the T.Ds adding the texture! This is surely scenic!

We first added a layer to just "bite" with the metal then a second smother layer. Afterwards we covered it in a sprtiz of water and added covered it in painters plastic. Repeat and continue for  oh umm .. 5 days. until all benches and Platform are done. So this week as well as doing . 8 classes i also worked a 44 hour week on a production i'm not even sure I am getting credit on as well you know ... its not scenic and this isnt to far off a normal week. I makes me wonder why one team are working so hard and another .. is only in every so often for a wee paint job. What is a Scenic Artist? What is a scenic painter? and what the hell is a T.D

Anyway off to sleep 9am paint call followed by a 2 day film shoot. Making the most of it i guess.