Modell:         TOKAMAK fusion reactor

Blender version:     2.91.2

Render Engin:     Cycles (Main) / Eevee

Polycount:         ~800K per segment (6) 

Extra:            Unwrapped
           
Additional Information:

There are two scenes.

In the first scene is the funsion reactor.

In the second is a shader that simulates small plasma stripes.

In the collection "Plasma" the plasma is blended with a boolean of a surface - this can slow down the viewport!