Maya Optimization: I watched this tutorial. However, I couldn't render it and make it, because Maya couldn't find and then couldn't render textures normally. I tried to reload them and still nothing. To be honest, the whole project file didn't work normally. Anyway tutorial is clear and I have the idea.
MR Shadows: This time I managed to reload all textures and Maya allowed me to make render. Only once :(
Dynamics.
Couldn't batch render first 2, because of this: Don't know how to fix it. I'll try reinstall Maya, but only by the end of this week.
Satisfied. Everything did as I wanted to. The final piece reflects my initial goal - recreate atmosphere.
Thanks to everyone. Special Thanks to Exe, Connect, Crashik, Rom@shka.
It's time to move on to the next project. And of course finish technical tutorials.