This is preferential but I see this a lot in student work. Your sky/ground plane grids don't need to be ultra precise. While specific perspective is helpful, drawing just enough to indicate what you are intending is all that is necessary. It will save you a lot of time too.
@crtvblock@insidematthieu Question: Do you primarily work in Clip Studio Paint or Photoshop when you're working with character designs for TV animation?
Prompt: Draw Amity and Braxus!
One of Bill Littlejohn's masterpiece scenes was the boxing match in "Snoopy Come Home" (1972). You can tell Bill Melendez gave his animators more room to stretch in the Peanuts features (thanks to better budgets). Choreography is so well planned out here.
The theater sequence from Gauche the Cellist (1982), dir. Isao Takahata, Oh! Production
Whimsical animation about a struggling cellist in a small-town orchestra -- by the co-founder of Studio Ghibli