Cottagecore visuals are usually filled with:
* a nature-like pallete with slight pastel colors(although they are used pretty often),with natural lightining.
*Motifs such as strawberries,mushrooms and flowers in various photografic ways(drawings,fabrics,home decor,etc).
*Wild fields
*Deciduous forests
*Cottages(of course)
*Victorian to 1930's ilustrations
And many other aspects.